Business and Economic Techniques. Please help me with this extended response homework question. Please show all working/steps.

You won a big contract to consult a company that runs a jewellery store that makes necklaces and bracelets from gold and platinum. The store has 18 units of gold and 20 units of platinum. Each necklace requires 3 units of gold and 2 units of platinum, whereas each bracelet requires 2 units of gold and 4 units of platinum. The demand for bracelets is no more than four. A necklace earns $300 in profit and a bracelet earns $400. The store wants you to determine the number of necklaces and bracelets it needs to make to maximize profit. c. The maximum demand for bracelets is 4 . If the store produces the optimal number of bracelets and necklaces, will the maximum demand for bracelets be met? If not, by how much will it be missed? (10 marks)