already have 1 and 2 done. need help with 3

Tempo Company's fixed budget (based on sales of 12,000 units) folllows. 1. Compute total variable cost per unit. 2. Compute total fixed costs. 3. Prepare a flexible budget at activity levels of 10,000 units and 14,000 units. Prepare a flexible budget at activity levels of 10,000 units and 14,000 units