Question 503655
p = price = amount customers pay
c = cost = amount the store paid for the jeans
p = 3c
.
After a month
sales price = p-5
.
After two weeks
sales price = (p-5)/2
.
Finally
sales price = (p-5)/2 -3
sales price = 14.99
.
(p-5)/2 -3 = 14.99
.
(p-5)/2 = 17.99
.
p-5 = 35.98
p = 40.98
.
p = 3c
3c = 40.98
c = 40.98/3
c =  13.66
.
The store paid $13.66 for the jeans.
.
Done.