Brief Exercise 17-12 Spin Cycle Architecture uses three activity pools to apply overhead to its projects. Each activity has a cost driver used to allocate the overhead costs to the projects. The activities and related overhead costs are as follows: initial concept formation $40,300; design $319,000; and construction oversight $121,600. The cost drivers and expected use are as follows. Expected Use of Cost Activities Cost Drivers Drivers per Activity Initial concept formation Number of project changes Design 146,000 Square feet Construction oversight Number of months 115 (a) Compute the predetermined overhead rate for each activity. (Round overhead rate persquare foot to 2 decimal places, e.g. 2.25 and all other answers to o decimal places, e.g. 1,225) Overhead Rate Initial concept formation per project change per square foot Design Construction oversight Per month