Mine Detectors (Pty) Ltd manufactures (metal) landmine detectors that are powered by wound metal coils. Most of the metal detectors are exported to African countries. The metal detectors are sold at R450 each. The variable cost per unit is R280 and fixed costs for annual production of up to 1 000 units are R90 000. Mine Detectors sells 800 units currently per year. Determine the following: a. The break-even quantity (per year) (3) b. The profit made by Mine Detectors