As a convention, an increase in assets is debited to the left side of the T-account. The following schematic diagram illustrates product costing: Stores FG WIP Debit Credit Debit Credit Debit Credit (4) (5) (6) If $XXX in factory overhead (FO) has been used, where is this transaction recorded? O a. Credit Stores (2) O b. Debit FG (5) O c. Debit WIP (3) O d. Credit FG (6) O e. Credit WIP (4) O f. Debit Stores (1)