Commercial Arithmetic Questions and Answers - Form 1 Topical Mathematics

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  1. Jane is a sales executive earning a salary of Ksh. 20,000 and a commission of 8% for the sales in excess of Ksh 100,000. If in January 2010 she earned a total of Ksh.48, 000 in salaries and commissions.
    1. Determine the amount of sales she made in that month (4 mks)
    2. If the total sales in the month of February and March increased by 18% and then dropped by 25% respectively. Calculate
      1. Jane’s commission in the month of February (3 mks)
      2. Her total earning in the month of March (3 mks)
  2. Wekhomba bought a laptop in Uganda for Ush.1, 050,000. He then paid 60 US dollars astransportation charges to Kenya. On arrival in Kenya he paid duty and sales tax amounting to 55%of the cost in Uganda. He then gave it to a friend in Tanzania tax free.
    If the exchange rates were US dollar = Ush 1016, 1Ksh = Ush 24.83 and Tsh 1 = Ksh 0.0714
    1. Calculate the total expenses in Kenya shillings incurred by Wekhomba (3 mks)
    2. Find the expenditure on transportation and taxes as a percentage of the total expenditure (2 mks)
    3. What is the total value of the laptop in Tanzanian shillings (2 mks)
    4. Find the overall increase in value of the laptop as percentage of the buying price (3 mks)


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