The Operations Manager for the Blue Moon Brewing Co

Multiple Choice

The operations manager for the Blue Moon Brewing Co. produces two beers: Lite (L) and Dark (D) . Two of his resources are constrained: production time, which is limited to 8 hours (480 minutes) per day; and malt extract (one of his ingredients) , of which he can get only 675 gallons each day. To produce a keg of Lite beer requires 2 minutes of time and 5 gallons of malt extract, while each keg of Dark beer needs 4 minutes of time and 3 gallons of malt extract. Profits for Lite beer are $3.00 per keg, and profits for Dark beer are $2.00 per keg.
For the production combination of 135 Lite and 0 Dark, which resource is slack (not fully used) ?

A) time (only)
B) malt extract (only)
C) both time and malt extract
D) neither time nor malt extract
E) cannot be determined exactly