Profit Margin Calculator

Purpose

Calculates true net profit and margin at both order-level and product-level granularity. Unlike basic revenue reports, this skill deducts all cost components — COGS (from inventoryItem.unitCost), shipping costs, transaction/payment processing fees, applied discounts, refund amounts, and duties/taxes — to surface actual margin percentages. Read-only — no mutations.

Prerequisites

Parameters

Safety

> ℹ️ Read-only skill — no mutations are executed. Safe to run at any time.

Workflow Steps

Inputs: query: "created_at:>=''", first: 250, select id, name, createdAt, totalPriceSet, subtotalPriceSet, totalShippingPriceSet, totalTaxSet, totalDiscountsSet, currentTotalPriceSet, displayFinancialStatus, refunds { totalRefundedSet }, lineItems { variant { id, inventoryItem { id, unitCost { amount, currencyCode } } }, quantity, originalTotalSet, discountedTotalSet }, pagination cursor

Expected output: All orders in window with full cost breakdown

Inputs: Batch of inventoryItemIds from line item variants for any missing unitCost data

Expected output: Unit cost for each inventory item

Inputs: Variant IDs from profitable/unprofitable items for product title context

Expected output: Product titles, SKUs for display

GraphQL Operations

# orders:query — validated against api_version 2025-01
query OrdersWithCosts($query: String!, $after: String) {
  orders(first: 250, after: $after, query: $query) {
    edges {
      node {
        id
        name
        createdAt
        displayFinancialStatus
        totalPriceSet { shopMoney { amount currencyCode } }
        subtotalPriceSet { shopMoney { amount currencyCode } }
        totalShippingPriceSet { shopMoney { amount currencyCode } }
        totalTaxSet { shopMoney { amount currencyCode } }
        totalDiscountsSet { shopMoney { amount currencyCode } }
        currentTotalPriceSet { shopMoney { amount currencyCode } }
        refunds {
          totalRefundedSet { shopMoney { amount currencyCode } }
        }
        lineItems(first: 50) {
          edges {
            node {
              quantity
              originalTotalSet { shopMoney { amount currencyCode } }
              discountedTotalSet { shopMoney { amount currencyCode } }
              variant {
                id
                sku
                inventoryItem {
                  id
                  unitCost { amount currencyCode }
                }
                product {
                  id
                  title
                }
              }
            }
          }
        }
      }
    }
    pageInfo { hasNextPage endCursor }
  }
}

# inventoryItems:query — validated against api_version 2025-01
query InventoryItemCosts($ids: [ID!]!) {
  nodes(ids: $ids) {
    ... on InventoryItem {
      id
      unitCost { amount currencyCode }
    }
  }
}

# productVariants:query — validated against api_version 2025-01
query VariantDetails($ids: [ID!]!) {
  nodes(ids: $ids) {
    ... on ProductVariant {
      id
      sku
      title
      product { id title vendor }
    }
  }
}

Session Tracking

Claude MUST emit the following output at each stage. This is mandatory.

On start, emit:

╔══════════════════════════════════════════════╗
║  SKILL: Profit & Margin Calculator           ║
║  Store: <store domain>                       ║
║  Started: <YYYY-MM-DD HH:MM UTC>             ║
╚══════════════════════════════════════════════╝

After each step, emit:

[N/TOTAL] <QUERY|MUTATION>  <OperationName>
          → Params: <brief summary of key inputs>
          → Result: <count or outcome>

On completion, emit:

For format: human (default):

══════════════════════════════════════════════
PROFIT & MARGIN REPORT  (<days_back> days)
  Orders analyzed:     <n>
  Total Revenue:       $<amount>
  Total COGS:          $<amount>
  Total Shipping:      $<amount>
  Total Tx Fees:       $<amount>
  Total Refunds:       $<amount>
  ─────────────────────────────
  Net Profit:          $<amount>
  Overall Margin:      <pct>%

  Top profitable products:
    "<product>"  Margin: <pct>%  Profit: $<n>
  Bottom margin products:
    "<product>"  Margin: <pct>%  Profit: $<n>
  Output: profit_report_<date>.csv
══════════════════════════════════════════════

For format: json, emit:

{
  "skill": "profit-margin-calculator",
  "store": "<domain>",
  "period_days": 30,
  "orders_analyzed": 0,
  "total_revenue": 0,
  "total_cogs": 0,
  "total_shipping": 0,
  "total_tx_fees": 0,
  "total_refunds": 0,
  "net_profit": 0,
  "overall_margin_pct": 0,
  "currency": "USD",
  "output_file": "profit_report_<date>.csv"
}

Output Format

CSV file profit_report_.csv with columns:

order_id, order_name, date, revenue, cogs, shipping, discounts, tx_fees, refunds, net_profit, margin_pct

For product grouping: product_id, product_title, vendor, units_sold, revenue, cogs, net_profit, margin_pct

Error Handling

Best Practices