The production department for a company requires 3600 kg of raw materials for manufacturing a particular item per year. It has been estimated that the cost of placing an order is Rs. 36 and the cost of carrying inventory is \( 26 \% \) of investment on the inventories. The price is Rs. 10 per kg. The purchase manager wishes to determine the operating doctrine for raw materials.

Calculate the gross profit margin for an item that cost the business \( \$ 12 \) and sold for \( \$ 30 \). Gross Profit = \( \$ 18 \) Gross Profit Margin = [?]\%

A lawnmower was traded in for R236 after 10 years. The depreciation was calculated at \( 9,2 \% \) p.a. on a straight-line basis. Determine the cost of the lawnmower 10 years ago.

Calculate the gross profit margin for an item that cost the business \( \$ 36 \) and sold for \( \$ 80 \). Gross Profit \( =\$ 44 \) Gross Profit Margin \( =[?] \% \)

Calculate the gross profit margin for an item that cost the business \( \$ 70 \) and sold for \( \$ 200 \). Gross Profit \( =\$ 130 \) Gross Profit Margin \( =[?] \% \)

A perfectly competitive firm has the following information in the short run. Total cost equation is given as \( T C=3 q^{2}+20 q+75 \); and the firm is currently producing 10 units of output which is the profit maximizing output level. 1. Find the profit maximizing price at which 10 units will be sold. 2. Find the level of profit or loss the firm is making in the short run. 3. What is the firm supply curve (equation)?