Blacktop Refining extracts minerals from ore mined at two different sites in Montana. Each ton of ore type 1 contains 20% copper, 20% zinc, and 15% magnesium. Each ton of ore type 2 contains 30% copper, 25% zinc, and 10% magnesium. Ore type 1 costs $90 per ton while ore type 2 costs $120 per ton. Blacktop would like to buy enough ore to extract at least 8 tons of copper, 6 tons of zinc, and 5 tons of magnesium in the least costly manner. a. Formulate an LP model for this problem.
b. Sketch the feasible region for this problem and find the optimal solution.

Xyz corporation has provided the following data concerning manufacturing overhead for july: actual manufacturing overhead incurred $ 69,000 manufacturing overhead applied to work in process $ 79,000 the company's cost of goods sold was $243,000 prior to closing out its manufacturing overhead account. the company closes out its manufacturing overhead account to cost of goods sold. which of the following statements is true? multiple choice manufacturing overhead was overapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $253,000 manufacturing overhead was underapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $233,000 manufacturing overhead was underapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $253,000 manufacturing overhead was overapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $233,000

Wilson center is a private not-for-profit voluntary health and welfare entity. during 2017, it received unrestricted pledges of $638,000, 65 percent of which were payable in 2017, with the remainder payable in 2018 (for use in 2018). officials estimate that 14 percent of all pledges will be uncollectible. a. how much should wilson center report as contribution revenue for 2017? b. in addition, a local social worker, earning $20 per hour working for the state government, contributed 600 hours of time to wilson center at no charge. without these donated services, the organization would have hired an additional staff person. how should wilson center record the contributed service?

Identify and describe a variety of performance rating scales that can be used in organizations including graphical scales, letter scales, and numeric scales.