Involves a type of quantitative research that systematically manipulates one or more variables to determine which variables have a causal effect on other variables.

Following is a list of various costs incurred in producing replacement automobile parts. with respect to the production and sale of these auto parts, classify each cost as either variable costs, fixed costs, or mixed costs. 1. oil used in manufacturing equipment 2. plastic 3. property taxes, $165,000 per year on factory building and equipment 4. salary of plant manager 5. cost of labor for hourly workers 6. packaging 7. factory cleaning costs, $6,000 per month 8. metal 9. rent on warehouse, $10,000 per month plus $25 per square foot of storage used 10. property insurance premiums, $3,600 per month plus $0.01 for each dollar of property over $1,200,000 11. straight-line depreciation on the production equipment 12. hourly wages of machine operators 13. electricity costs, $0.20 per kilowatt-hour 14. computer chip (purchased from a vendor) 15. pension cost, $1.00 per employee hour on the job

12. nelson corporation, which has only one product, has provided the following data concerning its most recent month of operations: selling price $ 115 units in beginning inventory 380 units produced 5,900 units sold 6,070 units in ending inventory 210 variable costs per unit: direct materials $ 46 direct labor $ 27 variable manufacturing overhead $ 3 variable selling and administrative $ 12 fixed costs: fixed manufacturing overhead $ 112,100 fixed selling and administrative $ 36,420 the company produces the same number of units every month, although the sales in units vary from month to month. the company's variable costs per unit and total fixed costs have been constant from month to month. a. prepare a contribution format income statement for the month using variable costing. unit product cost under variable costing direct materials direct labor variable manufacturing overhead variable costing unit product cost (formula)

Afinancial institution, the thriftem bank, is in the process of formulating its loan policy for the next quarter. a total of $12 million is allocated for that purpose. being a full-service facility, the bank is obligated to grant loans to different clientele. the following table provides the types of loans, the interest rate charged by the bank, and the possibility of bad debt as estimated from past experience. type of loaninterest rateprobability of bad debtpersonal.140.10car.130.07home.1 20.03farm.125.05commercial.100.02 bad debts are assumed unrecoverable and hence produce no interest revenue either. competition with other financial institutions in the area requires that the bank allocate at least 40% of the total funds to farm and commercial loans. to assist the housing industry in the region, home loans must equal at least 50% of the personal, car, and home loans. the bank also has a stated policy specifying that the overall ratio for bad debts on all loans may not exceed .04. formulate this problem as a linear program. define your variables clearly and write all the constraints explaining the significance of each.