Help me with this word problem? 20 points!

Ken received his bank statement in the mail and checked it to verify his recent pay increase. Ken has direct deposit so his paycheck is sent electronically to his account. The previous month's pay was $5,320.10. Ken's account activity showed a $651.22 previous balance, checks of $5,211.39ATM withdrawals of $250 and a service charge of $4.50. If Ken's new balance is $982.01what increase in pay was direct deposited?

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0

the correct answer is 5 6 and 7