Final answer:
To calculate the total cost assigned to a customer who has 7 designs done, divide the total cost in the Product Design cost pool by the total activity. Then, multiply the cost per design by the number of designs.
Step-by-step explanation:
To calculate the total cost assigned to a customer who has 7 designs done, we need to find the cost per design. We can do this by dividing the total cost in the Product Design cost pool ($200,000) by the total activity (1,600 designs). The cost per design is $125 ($200,000 ÷ 1,600 designs).
Now we can calculate the total cost assigned to a customer with 7 designs. We multiply the cost per design ($125) by the number of designs (7), which gives us a total of $875.
Therefore, the total cost assigned to a customer who has 7 designs done is $875.