Knoxville Manufacturing Company Produces X and Y with Contribution Margins

Multiple Choice

Knoxville Manufacturing Company produces X and Y with contribution margins per unit of $10 and $90, respectively. Only 200 labor hours and 400 machine hours are available for production. Time requirements to produce one unit of X and Y are as follows:
What is the constraint on labor hours for Knoxville Manufacturing Company?

A) 1X + 2Y ≤ 200
B) 10X + 90Y ≤ 200
C) 1X + 2Y ≤ 400
D) 1X + 4Y ≤ 400