Question

Cans of the brand of beans that I always buy are usually 90 cents each. Last week, however, they

had been reduced to 70 cents each, so I bought 36 cans.
This week they are back to 90 cents each, but there is a buy 2 cans, get another one free offer in
place.
How much more did I pay for the cans I bought last week than if I had bought them this week
instead?

Answer 1

$14.40

last week you paid $25.20. buy two get one free means you pay for 2/3 of what you get. if you bought 36 this week, then you only would have to pay paid for 12. each of those 12 cost 90 cents so that’d be $10.8. then $25.20 from last week minus what would’ve been $10.8 means you spent $14.40 more than you could’ve.