Corp manufactures two models, Economy and Deluxe. Weekly demand is estimated to be 100 units of the Economy Model and 55 units of the Deluxe Model. Corp does not allow weekly production to exceed weekly demand. The following per unit data apply:

Economy Deluxe

Contribution margin per unit $18 $20

Number of machine-hours required 3 4

If there are 448 machine-hours available per week, how many rockers of the Deluxe model should Tim produce to maximize profits?