Answer: $ 180
Step-by-step explanation:
Since, the amount he borrow = $ 150
Also, After borrowing the money for the dress he is charged 5% per month for 4 months,
Thus, The total amount of dress



Hence, the total amount of the dress = $180
(2/1 )(3/2)(4/3)...(n-1/n-2)(n/n-1)(n+1/n) = n + 1
n + 1 = n + 1
1 = 1 ( Fact )
Thus it is not importent what the value of n is at all because the equation is always have the equal number ( which is 1 ) in both sides .