There is a flat on Castle Street with 5 students living in it. There is $1,475 in total being put into the flat account each week, and at the beginning of March, there is $80 as a starting balance. In March, the costs totalled $5,450 and in April, they were $5,300 (due to a very warm Dunedin winter, so they used less power), the closing balance of the flat account at the end of April is: a. $530 O b. $1,130 c. $9,195 negative d. $7,720 negative e. None of the above