The following information was obtained regarding the production cost during the first six months of operation until the end of the year of an enterprise, which was established to produce one type of cabinet and started to operate on 1 July. Initial material and material expenses: D.I.M.M type Quantity per cabinet (m2) Unit purchase cost (S/m2) Hardboard 6 20 Formica 4 40 * Expenditure of excipients: Wood, plywood screws, nails, keys, locks, etc. Prices are $ 70 per locker. *Direct labor costs: Fee is paid per piece, and the fee per piece is $ 150 per cabinet. *Foreman fees: The monthly total amount of foreman wages is $ 100000. *Depreciations: The monthly amount of depreciation related to production vehicles and facilities is $ 120000. *Factory management expenses: The monthly total amount of various production expenses, which are excluded from the above items and collected under the heading of factory management expenses, is $ 140000 and is not affected by the number of products produced. a) Write down the expense functions that reflect the relationships between each of the business's production expenses and the monthly cabinet production. b) Write the monthly total cost of production function. c) Write down the annual total cost of production function. d) Write down the annual unit cost of production function e) If the total production of the enterprise for 6 months until the end of the year is 2000 products, what is the cost per cabinet