#cost-of-goods-sold
Cost of Goods Sold
Learn how to calculate and track cost of goods sold for inventory valuation
Custom Guitar Luthier Shop Bookkeeping: Why Your Wood Rack Isn't Inventory and Your Deposits Aren't Revenue
Custom guitar luthiers should book customer deposits as a liability (deferred revenue) until delivery, track each tonewood set's acquisition cost and CITES paperwork individually rather than by replacement value, and use job-based WIP tracking to compare actual labor hours against a typical 40-80 hour build estimate.
GMROI Explained: The Gross Margin Return on Inventory Investment Formula and 2026 Benchmarks
GMROI measures gross profit generated per dollar of average inventory cost; a GMROI above 3.0 is generally strong, below 1.0 means inventory is destroying margin dollars, and typical category ranges run from 1.2 in grocery to 6.5+ in electronics.
Grain Elevator Bookkeeping: Storage Fees, Basis Trades, and Deferred-Price Contracts Explained
Grain elevator bookkeeping separates elevator-owned inventory from bailment grain held for producers, tracks basis and deferred-price (NPE) contracts as distinct liabilities, and recognizes storage fees as service revenue earned over time rather than as a sale.
Leather Goods Maker Bookkeeping: Why Your Real Material Cost Isn't What You Paid Per Hide
A 50-square-foot hide costing $450 landed with a 64% yield rate has a real material cost of $14.06 per usable square foot, not the $9.00 the invoice implies — the gap driving margin surprises as 2026 tariffs and a shrinking U.S. cattle herd push leather prices up roughly 22%.
LLM API Costs Are COGS, Not Overhead: A Gross Margin Guide for AI Wrappers
LLM inference is a variable cost of delivering your product, not software overhead — ICONIQ's 2026 data puts AI product gross margins at a 52% industry average, well below the 70-80% typical of traditional SaaS.
Reupholstery Shop Bookkeeping: Bench-Time Costing and the Overhead Trap
A wingback chair takes 7-8 yards of fabric and a sofa 15-22, but shops that price by materials plus a flat labor guess routinely underbill by 20-30% because the fully burdened labor rate and per-job overhead never get calculated — only the fabric receipt does.
Virtual Medical Scribe Agency Bookkeeping: Billing, Provider Shifts, and the BAA You Can't Invoice Without
A virtual medical scribe agency needs a signed Business Associate Agreement before billing a single shift, and its pricing model — hourly, monthly subscription, or per-encounter — determines when revenue should be recognized and how the chart of accounts should be structured.
Indoor Skydiving Wind Tunnel Facility Bookkeeping: A Financial Guide
A recirculating wind tunnel costs $7-10 million to build, and running one full-speed at 230 km/h can draw over 570 kW, making electricity, not rent or payroll, the largest line item on most indoor skydiving facilities' income statements.
Meal Prep Delivery Bookkeeping: Why Your COGS Might Secretly Be Over 100% of Revenue
Meal prep and meal-kit subscriptions must defer prepaid revenue until meals are delivered and roll packaging, delivery, labor, and spoilage into COGS — early-stage operators who skip this often find total COGS above 55%, sometimes exceeding 100% of revenue on specific SKUs.
Mobile Car Detailing Bookkeeping: Chemical COGS, Mileage, and Equipment Depreciation
A $150 mobile detail costs $15-$20 in chemicals plus fuel, equipment wear, and unbilled quote time; tracking cost-per-job, the 72.5-cent 2026 IRS mileage rate, Section 179 equipment write-offs, and profit-per-drive-hour reveals whether a detailing business is actually as profitable as its revenue suggests.
Shoe Repair & Cobbler Shop Bookkeeping: Job Costing, Materials, and Tax Guide
U.S. shoe repair revenue is roughly $315.6 million and shrinking about 2% a year since 2020, yet job costing, split inventory tracking, and correct sales-tax treatment of repair labor are what let surviving cobbler shops price resoles profitably and diversify into leather goods and wholesale work.
Independent Bookstore Bookkeeping: How to Protect a 2-10% Net Margin
Independent bookstores net just 2-10% per the ABA's ABACUS survey, even with 40-50% gross margins. A practical bookkeeping guide to the transaction types that erode that margin — sale-or-return vendor credits, expiring co-op advertising funds, consignment and trade-credit liabilities — plus the 4-6x inventory turnover benchmark that predicts trouble early.