Sellerboard is a strong Amazon profit-analytics tool. The four reasons sellers outgrow it, an honest ranking of alternatives, and why forecasting is a different job than profit reporting.
Forecast accuracy explained: the MAPE formula with a worked example, MAPE vs WAPE vs bias, what counts as good, and why per-SKU per-channel measurement matters.
The 7 inventory KPIs that matter most — turnover, days of supply, sell-through, in-stock rate, GMROI, aged inventory %, and forecast accuracy — with formulas and healthy ranges.
EOQ is the order size that minimizes combined ordering and holding cost. The formula, a worked example, the three inputs, and the honest limits for multi-channel ecommerce.
Seven levers that reduce Amazon FBA fees in 2026 — storage, aged-inventory surcharge, low-inventory fee, inbound placement, size tier, AWD, and reimbursements — ranked by impact.
A good inventory turnover ratio for most ecommerce brands is ~4-8x — but it depends on category, margin, and channel. The formula, days-of-supply view, 2026 benchmarks, and the multi-channel catch.
Cogsy frames inventory as a DTC cash-flow decision; SKU Compass forecasts demand across Amazon + Shopify + Walmart with fee math and an optional analyst. Capability comparison and who should pick which.
The two safety stock formulas — the simple max method and the statistical service-level method — with worked examples, a Z-factor table, and the multi-channel catch.
The 6 best inventory tools for Shopify brands in 2026, ranked by who each fits — SKU Compass, Inventory Planner, Shopify native, Cogsy, Cin7, Katana.
Amazon FBA storage fees roughly triple in Q4. How the peak vs off-peak structure works, the aged-inventory surcharge, and how forecasting keeps storage costs down.
