During June. Assembly Department no. 4 of Hot Tech produced 1?.5G model 201 computer keyboards. Assembly of these units required 1,335 hours of direct labor at a cost of $5,, direct materials costing $120.CIEIU. and stilt) hours of machine time. Based on an analysis of overhead costs at the beginning of the yearr overhead is applied to keyboards using the following formula. Overhead = 12t}% of Direct Labor lCost + $300 per Machine Hour a. Compute the total amount of overhead cost applied to the 1?,500 keyboards. h. Compute the per-u nit cost of manufacturing these keyboards. f. Compute the gross prot that 1lrvill result from the sale of 6,000 of these keyboards at a sales price of $33 each. Wm Cost of manufacturing _ _