need help pls!

3. (6 points) Jardon Painting paints the interiors and exteriors of homes and commercial buildings. The company uses an activity-based costing system for its overhead costs. The company has provided the following data concerning its activity-based costing system. The "Other" activity cost pool consists of the costs of idle capacity and organization-sustaining costs. The company has already finished the first stage of the allocation process in which costs were allocated to the activity cost centers. The results are listed below: Required: a. Compute the activity rates (i.e., cost per unit of activity) for the Painting and Job Support activity cost pools by filling in the table below. Round off all calculations to the nearest whole cent. b. Prepare a Product Margin report for ONE job that involves painting 300 square meters and has direct materials cost of $1,000 and direct labor cost of $1,190. The total sales revenue from this job is $5,600. 4. (10 points) Archer Company is a wholesaler of custom-built air-conditioning units for commercial buildings. It gathered the following monthly data relating to units shipped and total shipping expense: Required: Using the high-low method, calculate the equation of a cost line for the shipping expense for this company (Y=a+bX)