Answer both parts complete correct and super fast to get thumbs up and a good comment!!

Part A:

To find:

1) Variable cost

2) Average cost

3) Fixed cost

Data:

Units = 25 units/hour

Fixed cost per unit = 15.25$

Labor cost per hour = 12$ per person

Required labor per hour = 10

Material cost = 0.075$ per unit

Part B:

One client requested 15 additional uniter per hour and willing to pay 10$ per unit for the remaining units. Determine the marginal cost?