question: Shiela bought five cell phones for $150 each for a 3-month installment. A 2% interest will be charged for each unit. How much will Shiela pay each month for 3 months?
answer: A $150 x 2/100 = $<<150*2/100=3>>3 interest will be charged for each unit.
  So, each cell phone costs $150 + $3 = $<<150+3=153>>153.
  The total amount to be paid for 5 cell phones is $153 x 5 = $<<153*5=765>>765.
  Thus, Shiela will pay $765/3 = $<<765/3=255>>255 each month.
  #### 255