In Order to Fertilize His Vegetable Farm,John,a Farmer,needs to Choose

Multiple Choice

In order to fertilize his vegetable farm,John,a farmer,needs to choose from two fertilizers: Nitro Plus and Phosphate Max.Each bag of Nitro Plus costs $7 and contains 8 pounds of nitrogen and 6 pounds of phosphate.Each bag of Phosphate Max costs $9 and contains 4 pounds of nitrogen and 8 pounds of phosphate.John's vegetable farm requires at least 32 pounds of nitrogen and 48 pounds of phosphate.(Assume fractions of a bag are allowed) .At the optimal solution,what is the cost of Nitro Plus used by John?

A) $12.85
B) $11.20
C) $7.65
D) $16.45