Answer:
C(X) = 4.50 X Â + 500 is the cost for producing X t -shirts.
Step-by-step explanation:
The fixed production cost = $500
Let the number of t shirts produced each month = X
Cost of production of each T shirt = $4.50
Selling price of each shirt  = $11.50
Now, The cost of production of X shirts
= Â X times ( Cost of each t shirt production) Â + Â Fixed Production Cost
= X ( $4.50) Â + Â $500 Â
= 4.50 X Â + 500
or C(X) = 4.50 X Â + 500 is the cost for producing X t shirts.