find the best buy on spaghetti sauce. you have a coupon for $0.75 off brand x and a coupon for $0.25 off brand y.

Question

28 ounces of brand x for $3.89
18 ounces of brand y for $1.89
13 ounces of brand z for $1.29

Answer 1

the price per ounce of the brands, with coupons:

x: (3.89-0.75)/28
y: (1.89-0.25)/18
z: 1.29/12

calculate those values and pick the lowest.