Flow of Product Costs through Accounts The following T accounts present a cost flow in which all or part of typical manufacturing transactions are indicated by parenthetical letters on the debit or credit side of each account. Materials Inventory (a) (c) Wages Payable (i) (b) (d) Manufacturing Overhead (b) (f) (c) (d) (e) Work in process Inventory (c) (g) (d) (f) Finished Goods Inventory (g) (h) Cost of Goods Sold (h)