You invested $30,000 and started a business writing greeting cards. Supplies cost $0.02 per card, x, and you are selling each card for $0.50. What is the cost function, C(x)?

C(x) = 0.02x + 30,000

C(x) = 0.50x

C(x) = 0.50 + 30,000

C(x) = 0.52x + 30,000