24 A stall sells nasi lemak for RM1.50 per pack at a markup of 30% based on cost. If the stall can sell 450 packs a day, with operating expenses of RM20 daily, find: (a) the cost per pack (b) the breakeven price per pack (c) the net profit per day. [Modified exam question] 25 A manufacturer produces water filters at a cost of RM 600 per unit. It sells the water filter at 40% markup on cost. Farid is a dealer. He purchases four units of water filters from the manufacturer. He sells the filters with a net profit of 55% on cost and the operating expenses amount to 10% of the cost. (a) What is the purchase price of the filter sold to Farid? (b) What is the selling price of the filter at Farid's shop? (c) Find the total net profit on selling the four filters. [Modified exam question] 26 A dealer buys a computer for RM3,600. Operating expenses are estimated to be 5% of the retail price. If the dealer wants a 15% net profit based on the retail price, find: (a) the retail price (b) the net profit [Modified exam question] (c) the markup. 27 A trader buys a set of ornaments that is listed at RM5,000 with trade discounts of 20% and 10%. If he sells the set at a net profit of 30% based on cost, and the operating expenses are 5% on cost, find: (a) the gross profit (b) the selling price (c) the breakeven price (d) the maximum markdown that could be given without incurring any loss. [Modified exam question]