The hidden inventory cost of multi-line BOM quoting — and how mid-market distributors are turning a margin-eroding workflow into a competitive advantage. A bill of materials (BOM) quote isn't a pricing problem — it's an inventory problem disguised as one. When a contractor sends a distributor a 200-line BOM on Monday and expects pricing by Wednesday, the distributor's ability to win that quote depends almost entirely on inventory: which items are in stock, which need to be sourced, what the real cost basis is across mixed supply chain cycles, and whether honoring the quote will create a stockout for other customers. Distributors who treat BOM quoting as a pricing exercise lose margin. Distributors who treat it as an inventory optimization exercise win the quote and protect the margin.