A family decides to purchase a washing machine for Ksh 40000. They pay a deposit of Ksh 10000 and agrees to pay the balance in 18 monthly installments of Ksh 2000 each. What is the total cost of the washing machine?

Bei ya kawaida ya mashine ya kufulia = Ksh 40,000 (hii ni bei ya kawaida, si lazima kuitumia moja kwa moja kwenye fomula ya HP)
Malipo ya awali ($D$) = Ksh 10,000
Idadi ya awamu za kila mwezi ($M$) = 18
Kiasi cha awamu ya kila mwezi ($I$) = Ksh 2,000

Kwanza, hesabu jumla ya malipo ya awamu:

Sasa, ongeza malipo ya awali:

Jumla ya kiasi kitakacholipwa kwa mashine ya kufulia kwa masharti ya ununuzi wa kukodisha ni Ksh 46,000.