Answer:
$104 in the store
Step-by-step explanation:
To find the original cost <u>before</u> the discount, you divide the discounted price by the percentage, getting 104.
$104
If the cost in the store is x we can write:
75%x = 78
0.75x = 78
x = 78 / 0.75 = 104
actually its depend on how is he working day by day
$15 × .8 = $12
$12 × .75 = $9