which costs the least per ounce?

28 oz . of chocolate for 2.24
60 oz. of chocolate for 5.40
16 oz. of chocolate for 1.76
35 oz. of chocolate for 3.16

To determine which option costs the least per ounce, we need to calculate the price per ounce for each option.

For 28 oz of chocolate costing $2.24:
Price per ounce = $2.24 / 28 oz = $0.08 per ounce

For 60 oz of chocolate costing $5.40:
Price per ounce = $5.40 / 60 oz = $0.09 per ounce

For 16 oz of chocolate costing $1.76:
Price per ounce = $1.76 / 16 oz = $0.11 per ounce

For 35 oz of chocolate costing $3.16:
Price per ounce = $3.16 / 35 oz = $0.09 per ounce

Therefore, the option that costs the least per ounce is 28 oz of chocolate for $2.24.