Answer:
Based on the calculations, Option 3 has the lowest price per ml of juice and is, therefore, the best value for Sara.
Explanation:
To find the cost of 1 ml of juice for each option, we need to calculate the price per ml of juice.
Option 1:
Regular carton is 500 ml and costs £1, with a 15% discount, the price would be:
1 - 0.15 = 0.85
0.85 x £1 = £0.85
Price per ml of juice = £0.85 ÷ 500 ml = £0.0017/ml
Option 2:
25% more juice than the regular carton is 625 ml, which is 125 ml more than option 3. But, the price is the same as the regular carton, which means:
Price per ml of juice = £1 ÷ 625 ml = £0.0016/ml
Option 3:
20% more juice than the regular carton is 600 ml, and with a 9% discount, the price would be:
1 - 0.09 = 0.91
0.91 x £1 = £0.91
Price per ml of juice = £0.91 ÷ 600 ml = £0.0015/ml
Based on the calculations, Option 3 has the lowest price per ml of juice and is, therefore, the best value for Sara.