Amazon Shipping Calculator

What the source does

• FilesystemNone observedNo reads or writes in the source
• NetworkNone observedNo outbound calls in the source
• ShellNone observedNo commands run in the source
• DependenciesPinnedNothing floats
• SecretsNone foundNo keys in source

Five audit layers

Gates applied: no behavioural pass.

Audit 0.4.1 · source sha 1bc9142374b1 · 19 Oct 2026Report an issue or request a re-scan

• Publishernexscope-ai GitHub organizationOwner of the repository this skill is read from
• Source foldernexscope-ai/Amazon-Skills/amazon-shipping-calculatorThe exact folder we audited
• LicenceMITAs the repository states it
• Commit pinned for this verdict1bc9142374b1A new audit runs when the source changes
• Repository statusNot archivedLast push 54 days ago
• Sandboxed runNot runSkills are read, not executed; layer L4 is skipped

Its description: Amazon FBA and FBM shipping cost calculator and fulfillment optimization. Dimensional weight analysis, storage fee calculation, removal cost estimation, and fulfillment method comparison. Use when the user asks about…

---
name: amazon-shipping-calculator
description: "Amazon FBA and FBM shipping cost calculator and fulfillment optimization. Dimensional weight analysis, storage fee calculation, removal cost estimation, and fulfillment method comparison. Use when the user asks about Amazon shipping costs, FBA fees, fulfillment costs, storage fees, or shipping calculations."
metadata: {"nexscope":{"emoji":"📦","category":"amazon"}}
---

# Amazon Shipping Calculator 📦

Comprehensive FBA and FBM cost calculator. Optimize fulfillment strategy and minimize shipping expenses.

## Installation

```bash
npx skills add nexscope-ai/Amazon-Skills --skill amazon-shipping-calculator -g
```

## Usage Examples

**FBA cost analysis:**
```
"Calculate FBA costs for my 12x8x4 inch product weighing 2.5 lbs - is FBA profitable vs self-fulfillment?"
```

**Dimensional weight optimization:**
```
"My product dimensions are 15x12x8 inches but only weighs 3 lbs - how can I optimize packaging to reduce FBA fees?"
```

**Storage fee planning:**
```
"I have 500 units in FBA storage for 8 months - what are my storage costs and when should I remove inventory?"
```

## Core Capabilities

### 1. FBA Cost Calculation & Analysis
- Complete FBA fee breakdown including fulfillment, storage, and additional service fees
- Dimensional weight analysis and packaging optimization recommendations
- Size tier determination and fee structure optimization strategies
- Multi-marketplace fee comparison and cost optimization across regions

### 2. FBM vs FBA Comparison & Strategy
- Comprehensive cost comparison between FBA and self-fulfillment options
- Break-even analysis and profitability assessment for each fulfillment method
- Hybrid fulfillment strategy development and product-specific recommendations
- Geographic and seasonal fulfillment optimization strategies

### 3. Storage Management & Optimization
- Storage fee calculation and long-term storage cost analysis
- Inventory aging tracking and removal cost planning
- Seasonal storage optimization and capacity planning strategies
- Inventory performance index (IPI) impact analysis and improvement recommendations

## How It Works

### Step 1: Cost Analysis & Fee Calculation
*Comprehensive fulfillment cost breakdown and fee analysis*

Calculate complete fulfillment costs and fee structures:
- Analyze product dimensions, weight, and packaging to determine accurate FBA size tiers and fees
- Calculate all FBA costs including fulfillment fees, monthly storage, long-term storage, and removal fees
- Compare FBA costs against self-fulfillment expenses including packaging, shipping, labor, and overhead costs
- Evaluate multi-marketplace fulfillment costs and identify optimization opportunities across regions

### Step 2: Optimization Strategy Development
*Packaging and fulfillment method optimization for cost reduction*

Develop cost optimization strategies:
- Identify packaging optimization opportunities to reduce size tiers and dimensional weight charges
- Analyze product portfolio for optimal fulfillment method selection (FBA vs FBM vs hybrid)
- Calculate break-even points and ROI for different fulfillment strategies and volume scenarios
- Develop seasonal and geographic fulfillment strategies to minimize costs and maximize efficiency

### Step 3: Implementation & Monitoring
*Strategic fulfillment execution and ongoing cost management*

Implement optimized fulfillment strategy:
- Execute packaging changes and fulfillment method transitions based on cost analysis and strategic objectives
- Monitor storage levels and implement inventory management strategies to minimize long-term storage fees
- Track fulfillment performance and costs to identify ongoing optimization opportunities
- Establish automated monitoring and alert systems for cost management and strategic adjustments

## Output Format

```
## Amazon Shipping & Fulfillment Cost Analysis
**Product:** [Product Name] | **ASIN:** [ASIN] | **Analysis Date:** [Date] | **Marketplace:** [US/UK/DE/etc]

### Product Specifications & Size Tier Analysis

**Physical Dimensions:**
- **Product Dimensions:** [L] x [W] x [H] inches
- **Product Weight:** [X.X] lbs (actual weight)
- **Packaging Dimensions:** [L] x [W] x [H] inches (with Amazon packaging)
- **Dimensional Weight:** [X.X] lbs (L×W×H ÷ 139)
- **Billable Weight:** [X.X] lbs (higher of actual or dimensional)

**FBA Size Tier Classification:**
- **Current Tier:** [Small Standard/Large Standard/Small Oversize/Medium Oversize/Large Oversize/Special Oversize]
- **Tier Factors:** [Based on dimensions, weight, and category]
- **Fee Structure:** [Fees applicable to this size tier]

**Dimensional Weight Optimization:**
- **Current DIM Weight:** [X.X] lbs
- **Optimization Potential:** [Y.Y] lbs savings possible
- **Recommended Actions:** [Specific packaging changes to reduce tier]
- **Potential Savings:** $[X.XX] per unit reduction in fulfillment fees

### Complete FBA Cost Breakdown

**Fulfillment Fees (Per Unit):**
| Fee Component | Current Cost | Optimized Cost | Savings Opportunity |
|---------------|--------------|----------------|-------------------|
| Pick & Pack | $[X.XX] | $[X.XX] | $[X.XX] |
| Weight Handling | $[X.XX] | $[X.XX] | $[X.XX] |
| **Total Fulfillment Fee** | **$[X.XX]** | **$[X.XX]** | **$[X.XX]** |

**Storage Fees (Monthly):**
- **Standard Size Storage:** $[X.XX] per cubic foot per month (Jan-Sep: $0.87, Oct-Dec: $2.40)
- **Oversize Storage:** $[X.XX] per cubic foot per month (Jan-Sep: $1.20, Oct-Dec: $2.40)
- **Your Product Volume:** [X.XX] cubic feet per unit
- **Monthly Storage Cost:** $[X.XX] per unit per month
- **Annual Storage Cost Range:** $[X.XX] - $[Y.YY] per unit (seasonal variation)

**Long-term Storage Fees:**
- **6+ Months:** $[X.XX] per cubic foot (assessed monthly)
- **12+ Months:** $[X.XX] per cubic foot (assessed monthly)  
- **Your Risk:** $[X.XX] per unit if stored 6+ months
- **Removal Threshold:** Consider removal after [X] months to avoid fees

**Additional FBA Fees:**
- 

Excerpt, first 6,002 characters of SKILL.md, verbatim from the audited commit. It is text from someone else’s repository, quoted so you can judge it before your agent reads it.

npx skills add nexscope-ai/Amazon-Skills --skill amazon-shipping-calculator -g

git clone https://github.com/nexscope-ai/Amazon-Skills
git -C Amazon-Skills checkout 1bc9142374b1

Works in

1. 2026-10-19
   ✓SAFE B 89 / 100

   first audit · source 1bc9142374b1

Questions about Amazon Shipping Calculator

• github.com/nexscope-ai/Amazon-Skills/tree/main/amazon-shipping-c — the audited source at commit 1bc9142374b1 and every finding aboveObserved · 19 Oct 2026

Spotted something wrong? Report a correction · Methodology