July 1 balance, 70 units @ $50 $3,500

Purchases:

July 18: 40 units @ $51

July 28: 40 units @ $52

Sales:

July 12: 30 units

July 22: 30 Units

July 31: 45 units

Compute the July 31 ending inventory and cost of goods sold for July, assuming

1. LIFO and perpetual inventory system

2. LIFO and periodic inventory system

3. FIFO and perpetual inventory system

4. FIFO and periodic inventory system

5. Weighted average and perpetual inventory system