in a one-month period, a convenience store
from other in-store products
sales of $65 560 from its gas pumps and sales of $36 740

what percent of total sales were from gasoline?

So, youd start by adding the two sales together to get total sales. Then you would divide that number by the gas sales to get the percent

65560+36740 = x

36740/ x = the percentage :)

Ican't do any of the other stuff, but i can get you started. the answer, i believe, is $2.50.