Final answer:
The subject of this question is Business at the College level, focusing on the expenses and operation of Montana mining company.
Step-by-step explanation:
The subject of this question is Business and the grade level is College. In this question, we are given information about Montana mining company and its expenses on an ore deposit and machinery. The company pays $4,365,500 for the ore deposit containing 1,520,000 tons and installs machinery costing $202,800. It then mines and sells 137,000 tons of ore during the year. We can analyze the expenses and the amount of ore mined to calculate various financial aspects of the company's operation.