If variable manufacturing costs are $8 per unit and total fixed manufacturing costs are $572,700, what is the manufacturing cost per unit if:

a. 6,900 units are manufactured and the company uses the variable costing concept? $

b. 8,300 units are manufactured and the company uses the variable costing concept? $

c. 6,900 units are manufactured and the company uses the absorption costing concept? $

d. 8,300 units are manufactured and the company used the absorption costing concept? $

Please show work clearly, thank you!