Break-even analysis for a service company T-Mobile US, Inc. (TMUS) is one of the largest digital wireless service providers in the United States. In a recent year, it had 102.1 million subscribers (accounts) that generated service revenue of $50,395 million. Costs and expenses for the year were as follows (in millions): Assume that 30% of the cost of revenue and 70% of the sellino, general, and administrative expenses are fixed to the number of direct subscribers (accounts), In part ( a ) and (b), round all interim calculations and final answers to one decimal place. a. What is T-Mobile's break-even number of accounts, using the data and assumptions olven? million accounts b. How much revenve per secount would be sufficient for T-Mobile to break even if the number of accounts remained constant? 3 million per account