can you show me how to solve this

Emcee Company provided the following information relating to inventory for the month of December: Units Unit cost Unit selling price Dec. 1 Beginning 10,000 52 7 Purchase 30,000 50 12 Sale 20,000 90 17 Purchase 60,000 45 22 Purchase 20,000 43 28 Sale 70,000 90 Required: Assuming the entity used the periodic system, compute the December 31 inventory and cost of goods sold under: 1. FIFO 2. Weighted average