Marks Corporation has two operating departments, Drilling and Grinding, and an office. The three categories of office expenses are allocated to the two departments using different allocation bases. The following information is available for the current period: Office Expenses Total Allocation Basis Salaries $ 39,000 Number of employees Depreciation 29,000 Cost of goods sold Advertising 68,000 Net sales Item Drilling Grinding Total Number of employees 1,800 2,700 4,500 Net sales $ 368,000 $ 552,000 $ 920,000 Cost of goods sold $ 121,600 $ 198,400 $ 320,000 The amount of depreciation that should be allocated to Drilling for the current period is:

You are the manager of a large crude-oil refinery. as part of the refining process, a certain heat exchanger (operated at high temperatures and with abrasive material flowing through it) must be replaced every year. the replacement and downtime cost in the first year is $165 comma 000. this cost is expected to increase due to inflation at a rate of 7% per year for six years (i.e. until the eoy 7), at which time this particular heat exchanger will no longer be needed. if the company's cost of capital is 15% per year, how much could you afford to spend for a higher quality heat exchanger so that these annual replacement and downtime costs could be eliminated?