Answer and Explanation:
1. The classification of estimated manufacturing overhead is shown below:-
Direct materials = Product cost
Direct labor = Product cost
Manufacturing overhead = Product cost
Selling expense = Period cost
2. The computation of total product cost for last month is shown below:-
= Direct materials + direct labors + manufacturing overhead
= $7,000 + $3,000 + $2,000
= $12,000
3. And, the unit product cost is
= Total product cost ÷ number of units
= $12,000 ÷ 4,000 units
= $3 per unit