I need help C and D

The labor cost to produce a certain item is $21.00 per hour. Job setup costs $500 and material costs are $30 per unit. The item can be purchased for $200.00 per unit. The learning rate is 80 percent. Overhead is charged at a rate of 25 percent of labor, materials, and setup costs.

a. Determine the total production cost if 25 units need to be produced, given that the first unit took 8 hours to complete.

b. What is the minimum production quantity (n) necessary to make production cost less than purchase cost?

Labor Cost Per Hour	$ 21.00
Learning Curve	60%
Set up cost	$ 500.00
Time for the first unit	8
Material Cost	$ 30.00
Overhead	25%
Purhase cost	$ 200.00
A	25		B	15
Material Cost	$ 750.00		Material Cost	$ 450.00
Labor Cost	$ 2,067.91		Labor Cost	$ 1,429.77
Set up Cost	$ 500.00		Set up Cost	$ 500.00
Overhead Cost	$ 829.48		Overhead Cost	$ 594.94
Total Cost	$ 4,147.39		Total Cost	$ 2,974.71
Per Unit Cost	$ 165.90		Per Unit Cost	$ 198.31
			Difference	$ 1.69

c. Create a graph plotting the following data series plotted against varying levels of Q

Setup Cost
Total Variable Cost
Total Labor Cost
Total Overhead Cost
Total Materials Cost
Total Cost (setup+variable+labor+material+overhead)

d. Create a graph plotting the following data series plotted against varying levels of Q

Average Production Cost

Average Purchase Cost