P20-4A Intercraft/Burns manufactures picture frames. The primary materials (wood, plastic, and glass) and direct labor are traced directly to the products. Manufacturing costs are allocated based on machine hours. Data for the year 20X4 follow: Budget Actual Machine hours. 25,000 hours 29,600 hours Direct labor hours.. Wood Maintenance labor trepairs to equipment) Plant supervisor's wages.. Screws, nails, and glue. 42,000 hours 40,000 hours $150.000 $148.000 5,000 16.500 30,000 32.000 15.500 32.000 Plant utilities 25.000 49,575 Plastic Glass 75,000 70,500 125.000 126,275 Freight out.. 35.000 44.500 Direct labor 65.000 63.000 Depreciation on plant and equipment 62,000 62.000 Advertising expenses. 40.000 55.000 Required 1. Compute the predetermined manufacturing overhead rate.. 2. Post actual and allocated manufacturing overhead to the Manufacturing Overhead T- account. 3. Close the under- or overallocated overhead to cost of goods sold. 4. The predetermined manufacturing overhead rate usually turns out to be inaccurate. Why don't accountants just use the actual manufacturing overhead rate?