$4.50*8=36.00, 36.00*8= 8/8/2014 | Catherine from Dunedin, FL | 3 Answers | 0 Votes Mark favorite Subscribe Comment
You have to obtain the unit value per can which is 4.50/8 Then obtain the value for the 28 (4.5/8)*28 = 15.75 8/8/2014 | Francisco E. Comment
Catherine, You need to find the price for (8 + 8 + 8 + 4) = 28 cans of cat food. This works out to (3 x $4.50) + 4 x ($4.50/8) = (3 x $4.50) + ($4.50/2) = $13.50 + $2.25 = $15.75 8/8/2014 | Stephen K. Comment
The $4.50 is for all 8 cans of cat food, so the cost for each can is: $4.50/8 = $0.5625 per can [56.25 cents per can) So for 28 cans: ($0.5625 per can)*(28 cans) = $15.75 ----- Another way to do it is to set up a proportion: $4.50/8 = $x/28 Solve for x - same answer as above. 8/8/2014 | Philip P. Comment