Shampoo is sold at two sizes A and B A contains 800ml and costs $1.30and B contains 1.5 liters and costs $2.30 Which is the better value for money? Show your working clearly

Answer 1

divide cost by volume to get $/L
pick the smaller value

or, divide volume by cost to get L/$
pick the larger value

Answer 2

dollars per liter ... or ... cents per milliliter

A ... 1.30 / .800 = ? $/L

B ... 2.30 / 1.5 = ? $/L

Answer 3

A is 800 mL / $1.30 = 615 mL / $
B is 1500 mL / $2.30 = 652 mL / $ much more for a dollar