In more detail
750 mL for $2.49 is $3.32 a litre; 1.5 L for $4.29 is $2.86 a litre, about 14% cheaper per litre. The bigger pack is not always the better value, so compare.
Unit price is the cost per standard unit of measure, such as per litre or per 100 g, which lets you compare differently sized packages fairly.
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750 mL for $2.49 is $3.32 a litre; 1.5 L for $4.29 is $2.86 a litre, about 14% cheaper per litre. The bigger pack is not always the better value, so compare.