Petro Motors, Inc. (PMI), produces small gasoline-powered motors for use in lawn mowers. The company has been growing steadily over the past five years and is operating at full capacity. PMI recently completed the addition of new plant and equipment at a cost of $6,100,000, thereby increasing its manufacturing capacity to 108,000 motors annually. The addition to plant and equipment will be depreciated on a straight-line basis over 10 years.

Sales of motors were 75,000 units prior to the completion of the additional capacity. Cost records indicated that manufacturing costs had totaled $71 per motor, of which $60 per motor was considered to be variable manufacturing costs. PMI has used the volume of activity at full capacity as the basis for applying fixed manufacturing overhead. The normal selling price is $115 per motor, and PMI pays a 13% commission on the sale of its motors.

LawnPro.com offered to purchase 22,000 motors at a price of $69 per unit to test the viability of distributing lawn mower replacement motors through its website. PMI would be expected to produce the motors, store them in its warehouse, and ship individual motors to LawnPro.com customers. As orders are placed directly through the LawnPro.com website, they would be forwarded instantly to PMI. No commissions will be paid on this special sales order, and freight charges will be paid by the customer purchasing a motor.

Required:

Calculate the cost per motor, for cost accounting purposes, after completion of the additional plant capacity. (Do not round intermediate calculations.)

COST PER MOTOR>>>>>>

I came up with the following, but it said that it was wrong... Please provide calculations also.

Fixed cost per unit before additional capacity = $ (72 - 64) = $ 8 71-60 = $11

Total fixed cost at full capacity before additional capacity = $ 11 x 75,000 = $ 825,000

After additional capacity, PMI would incur additional depreciation expense per annum of $ 6,100,000 / 10 = $ 600,000

Total fixed cost after additional capacity = $ (825,000 + 600,000) = $ 1,425,000

Fixed cost per unit = $ 1,425,000 / 108,000 = $ 13.19

Total manufacturing cost per unit = Unit variable cost + Unit fixed cost = $ (60 + 13.19) = $ 73.19

Selling cost per motor = $ 115 x 13% = $ 14.95

Total cost of sales per unit = $ (73.19+ 14.95) = $ 88.14