The grounds, a coffee shop, has daily averaged fixed costs of $273 each day and unit costs of $0.85 per cup of coffee. The coffee sells for $2.15 per cup. a) what is the cost function? C(x)=______ b) what is the revenue function? R(x)=______ c) how many cups of coffee must be sold each day to break even? _____cups d) how many cups must be sold to make a profit of $1,000?