Problem 4-1A Combat Fire, Inc. manufactures steel cylinders and nozzles for two models of fire extinguishers: (1) a home fire extinguisher and (2) a commercial fire extinguisher. Thehome modelis a high-volume (54,000 units), half-gallon cylinder that holds 2 1/2 pounds of multi-purpose dry chemical at 480 PSI. Thecommercial modelis a low-volume (10,200 units), two-gallon cylinder that holds 10 pounds of multi-purpose dry chemical at 390 PSI. Both products require 1.5 hours of direct labor for completion. Therefore, total annual direct labor hours are 96,300 or [1.5 hours (54,000 + 10,200)]. Expected annual manufacturing overhead is $1,567,900. Thus, the predetermined overhead rate is $16.28or ($1,567,900 96,300) per direct labor hour. The direct materials cost per unit is $18.50 for the home model and $26.50 for the commercial model. The direct labor cost is $19 per unit for both the home and the commercial models. The companys managers identified six activity cost pools and related cost drivers and accumulated overhead by cost pool as follows. Expected Use of Drivers by Product | Activity Cost Pools | Cost Drivers | Estimated Overhead | Expected Use of Cost Drivers | Home | Commercial | Receiving | Pounds | $85,400 | 335,000 | 215,000 | 120,000 | Forming | Machine hours | 155,000 | 35,000 | 27,000 | 8,000 | Assembling | Number of parts | 403,000 | 217,000 | 165,000 | 52,000 | Testing | Number of tests | 45,000 | 25,500 | 15,500 | 10,000 | Painting | Gallons | 55,500 | 5,258 | 3,680 | 1,578 | Packing and shipping | Pounds | 824,000 | 335,000 | 215,000 | 120,000 | $1,567,900 | | | | |