First find the area of the first wall: 5 feet * 8 feet = <<5*8=40>>40 square feet

Then find the area of the second wall: 7 feet * 8 feet = <<7*8=56>>56 square feet

Then add the areas of the two walls to find the total area: 40 square feet + 56 square feet = <<40+56=96>>96 square feet

Then divide the number of square feet by the number of tiles per square foot to find the total number of tiles needed: 96 square feet * 4 tiles/square foot = <<96*4=384>>384 tiles

Then find the difference in cost per tile: $13/tile - $11/tile = $<<13-11=2>>2/tile

Then multiply the number of tiles by the cost difference per tile to find the total cost difference: $2/tile * 384 tiles = $<<2*384=768>>768

# Answer

768
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Janet is considering two options to retile her bathroom. The turquoise tiles cost $13/tile and the purple tiles cost $11/tile. If Janet needs to tile two walls that measure 5 feet by 8 feet and 7 feet by 8 feet, and each square foot of wall takes 4 tiles, how much will Janet save by buying the purple tiles instead of the turquoise ones?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
768
Janet is considering two options to retile her bathroom. The turquoise tiles cost $13/tile and the purple tiles cost $11/tile. If Janet needs to tile two walls that measure 5 feet by 8 feet and 7 feet by 8 feet, and each square foot of wall takes 4 tiles, how much will Janet save by buying the purple tiles instead of the turquoise ones?
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