Kara's Custom Tees experienced fixed costs of $300 and variable costs of $2 a shirt. Write an equation that can used to determine the total expenses encountered by Kara' s Custom Tess.

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Let x be the number of shirts, let C(x) be the total cost of producing x shirts.

Then, C(x)=___________(Simplify Answer)

The cost of producing 9 shirts is $_________.