Shown below is activity for one of the products of Denver Office Equipment:

January 1 balance, 500 units @ $55 per unit $27,500

Purchases:

January 10: 500 units @ $60 per unit

January 20: 1,000 units @ $63 per unit

Sales:

January 12: 800 units

January 28: 750 units

Part a) Compute the January 31 ending inventory and cost of goods sold for January, assuming Denver uses Weighted Average Cost Method and a Periodic Inventory System.

Part b) Compute the January 31 ending inventory and cost of goods sold for January, assuming Denver uses Weighted Average Cost Method and a Perpetual Inventory System.