Hart Company made 3,140 bookshelves using 22,140 board feet of wood costing $283,392. The company's direct materials standards for one bookshelf are 8 board feet of wood at $12.70 per board foot. Hart Company uses a standard costing system. (1) Prepare the journal entry to charge direct materials costs to Work in Process Inventory and record the materials variances. (2) Assume that Hart's materials variances are the only variances accumulated in the accounting period and that they are immaterial. Prepare the adjusting journal entry to close the variance accounts at period-end.