Neco 2024 Data Processing Question 12

A company records monthly sales (in Naira) of three products A, B and C for a full year.\n\nProduct A sales (Jan-Dec): 50 000, 55 000, 60 000, 65 000, 70 000, 75 000, 80 000, 85 000, 90 000, 95 000, 100 000, 105 000.\n\nProduct B sales are known for the first six months only: Jan = 40 000, Feb = 42 000, Mar = 44 000, Apr = 46 000, May = 48 000, Jun = 50 000. The sales for July-December are not given.\n\nThe total annual sales of product C are 300 000 Naira, and product C sales are the same each month. The total annual sales of all three products combined are 1 800 000 Naira.\n\n(a) Determine the monthly sales of product B for July-December.\n(b) For each quarter (Q1: Jan-Mar, Q2: Apr-Jun, Q3: Jul-Sep, Q4: Oct-Dec) compute the percentage contribution of product B to the total sales of that quarter.\n(c) Identify the quarter in which product B contributed the greatest percentage to the quarter's total sales, and give that percentage rounded to two decimal places.