Answer:
C(x) = 134 + 0.78
Step-by-step explanation:
Let
x = number of drinks they made
Total cost, C(x) = fixed cost + variable cost
Fixed cost = $134
Variable cost = additional cost per drink * number of drinks
= 0.78 * x
= 0.78x
C(x) = 134 + 0.78
They sell each drink = $3.50
Total revenue, R(x) = sale price of each drink * number of drinks
= 3.50 * x
= 3.50x
R(x) = 3.50x
