Calculate the unit price to the nearest tenth of a cent, and determine the better or best buy based on price alone.
5. Chen Wu is buying potato chips. The following sizes are for sale: 1.5 ounces, $0.65; 5.75 ounces, $1.30; and a 0 ounces, $2.45 2-pack of the 5.75 ounces, $2,45.
The offer in which the unit price is the lowest will be the best buy.
So, for 1.5 ounces of potato chips for $0.65,
Unit price = $0.65/1.5 ounces = $0.43 per ounce
For 5.75 ounces of potato chips for $1.30,
Unit price = $1.30/5.75 ounces = $0.23 per ounce
For 2-pack of the 5.75 ounces of potato chips for $2.45,
Unit price = $2.45/(2 × 5.75) ounces = $0.22 per ounce
Thus, the best buy is 2-pack of the 5.75 ounces, $2.45.