Final answer:
To calculate job costs for Raider Company, total costs, average variable costs, average total costs, and marginal costs must be computed by considering both fixed and variable costs. Creating a cost table is crucial in determining these costs. Reducing engineering change orders for a job lowers its cost but doesn't necessarily impact other jobs' costs.
Step-by-step explanation:
Raider Company, a costing firm, uses activity-based costing to apply overhead to jobs. To calculate costs for each job, one must begin by determining the cost structure for the firm. The costs include total fixed costs and variable costs.
Total costs are calculated by adding fixed costs to variable costs. Average variable cost is computed by dividing the total variable costs by the number of units produced. Average total cost is the sum of the average variable cost and average fixed cost (total fixed cost divided by the number of units produced). Marginal cost represents the additional cost of producing one more unit and can typically be found by looking at the increase in total cost when one additional unit is produced.
For a costing firm like Raider, creating a table that shows output, total cost, marginal cost, average cost, variable cost, and average variable cost helps to illustrate the cost breakdown for each job. This is fundamental in job-order costing systems, especially when using activity-based costing methods.
If Job 13-46 required no engineering change orders, the cost of that job would be reduced by the amount that was budgeted for engineering change orders. This change would not directly affect the cost of other jobs unless the overhead allocation method spread savings from reduced engineering costs across all jobs.