You and four friends go to johnny rockets. you all split the bill equally. each person’s share was $6.50. how much was the original bill? let a represent the amount of the original bill.

The answer is  $26.00 because

$6.50*(4+1)= $6.50*5, which is $26.00.
hope this helps you.

If "a" represents the original bill, your equation would look like this;
a = 6.5*(5)
6.5 * (5) = $32.50

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho

70 dollars is the answer