During June, Assembly Department no. 4 of Hot Tech produced 17,500 model 201 computer keyboards. Assembly of these units required 1,875 hours of direct labor at a cost of $50,000, direct materials costing $120,000, and 400 hours of machine time. Based on an analysis of overhead costs at the beginning of the year, overhead is applied to keyboards using the following formula. Overhead = 120% of Direct Labor Cost + $300 per Machine Hour a. Compute the total amount of overhead cost applied to the 17,500 keyboards. b. Compute the per-unit cost of manufacturing these keyboards. f. Compute the gross profit that will result from the sale of 6,000 of these keyboards at a sales price of $30 each.