Hamza incorporation manufactures a single product a commercial filing cabinet that it sell to office furniture distributors. The company is using a single ABC system that it uses for internal decision making. The company has two overheads departments whose costs are listed below.

Selling and Administrative overhead	$400,000
Manufacturing overhead	$450,000
Total overhead cost	$850,000

The companys ABC system has the following activity cost pools and activity measures:

Activity Cost Pool	Activity Measure
Assembling units	Number of units
Processing orders	Number of orders
Supporting customers	Number of customers
Others	Not applicable

Costs assigned to the Other activity cost pool have no activity measure; they consist of the costs of unused capacity and organization-sustaining costsneither of which are assigned to orders, customers, or the product. Umair Corporation distributes the costs of manufacturing overhead and selling and administrative overhead to the activity cost pools based on employee interviews, the results of which are reported below:

Distribution of Resource Consumption Across Activity Cost Pool
	Assembling units	Processing orders	Supporting customers	Others	Total
Manufacturing overhead	55%	25%	10%	10%	100%
Selling and Administrative overhead	15%	40%	20%	25%	100%
Total Activity 500 units 110 orders 91 customers

Required:

1. Perform the first-stage allocation of overhead costs to the activity cost pools.
2. Compute activity rates for the activity cost pools.
3. Office Mart is one of Fazal Corporations customers. Last year, Office Mart ordered filing cabinets four different times.
4. Office Mart ordered a total of 80 filing cabinets during the year. The selling price of a filing cabinet is $595. The cost of direct materials is $180 per filing cabinet, and direct labour is $50 per filing cabinet. What is the customer margin of Office-Mart?