Financial statement information is presented below:

Sales revenue 150,000 Cost of goods sold 91,000 Net income 8,000 Beginning accounts receivable 17,000 Ending accounts receivable 13,000 Beginning inventory 19,600 Ending inventory 16,800

1. Compute the gross profit ratio.

2. Compute the net profit margin.

3. Compute the days in inventory.

4. Compute the collection period (in days).