Answer:
Attached is the complete questions containing the missing variables:
The activity rates for each activity are stated thus:
Cutting activity rate =$24/cutting hour
Assembly activity rate =$40/ assembly hour
Inspecting activity rate =$20/ inspecting hour
Reworking activity rate=$75/reworking hour
Explanation:
Cutting activity rate =$225600/(4000+5400)=$24/cutting hour
Assembly activity rate =$300000/(2850+4650)=$40/ assembly hour
Inspecting activity rate=$67500/(945+2430)=$20/ inspecting hour
Reworking activity rate=$45000/(150+450)=$75/reworking hour
Obviously you did not include the overheads incurred for each activity in your question,but I have the overhead for each activity in the attached full question with which I computed the required overhead activity rates