The total cost of producing x units for which the fixed costs are $2900 and the cost per unit is $25

[math_celebrity]

The total cost of producing x units for which the fixed costs are $2900 and the cost per unit is $25

Set up the cost function:
Cost function = Fixed Cost + Variable Cost per Unit * Number of Units

Plug in Fixed Cost = 2900 and Cost per Unit = $25
C(x) = 2900 + 25x