its equal to because if you do +50-50 and keep going it will always go back to 0. Hope this helps! :D
Re-upload the photo you posted because it isnt showing up :(
The answer is C. This would make the total cost 90 dollars without paying for a membership card or shipping.
Shortest is 3/4 longest is 1 1/2. 1 1/2 -3/4=3/4
