o Librerie come collection A. 275 minutes B. 300 minutes C. 250 minutes 0.225 minutes QUESTION 20 A firm's phone bill consists of both a fixed line charge and a variable cost per minute of phone use. The firm has collected four months of data on phone costs: Month Minutes of Phone Use Total Phone Bill January 460 $3,000 February 200 $2,675 March 170 $2,660 April 310 $2,825 Use the high-low method to determine the variable cost per minute of phone use. (Round your answer to the nearest cent.) A. $0.85 B. $6.52 C. $1.17 OD.$0.11 QUESTION 21 A firm's break-even point is where: A. The sales revenue equals the total costs B. The sales revenue equals the variable costs C. The fixed costs equal the variable costs D. The sales revenue equals the fixed costs QUESTION 22