2-21 Variable costs and fixed cosE. Consolidated Minerals (CM) owns the rights to extract minerals from beach sands on Fraser Island. GM has costs in three areas: a. Payment to a mining subcontractor who charges $30 per ton of beach sand mined and returned to the beach (after being processed on the mainland to extract three minerals: ilmenite, ruiile, and zircon]. b. Payment of a government mining and environmental tax of EEG per ton of beach sand mined. c. Payment to a barge operator. This operator charges $15, per month to transport each batch of beach sand up to Ill-[l tons per batch per dayto the mainland and then return to Fraser Island (that is, U- to 100 tons per dayr = $15, per month; ll to 20D tons per Ida}r = $30!],{i-D per month, and so on). Each barge operates 25 days per month. The $15 monthly charge must be paid even if fewer than l tons are transported on any day and even if CM requires fewer than 25 days of barge transportation in that month. CM is currently mining 13D tons of beach sands per day for 25 days per month. Required 1. What is the variable cost per ton of beach sand mined? 'What is the fixed cost to CM per month? 2. Plot a graph of the variable costs and another graph of the fixed costs of CM. Your graphs should be similar to Exhibit 2-3, Panel A (p. 3].], and Exhibit 211 (p. 34]. Is the concept of relevant range applicable to your graphs? Explain. 3. Islhat is the unit cost per ton of beach sand mined {a} if 181:} tons are mined each day and {b} if 220 tons are mined each day? Explain the difference in the unitcost gures