The phone bill for a company consists of both fixed and variable costs. Refer to the four-month data below and apply the high-low method to answer the question. 1. What is the variable cost per minute? (Round your answer to the nearest cent.) a) $1.17 b) $6.52 c) $0.85 d) $0.11 2. What is the total cost at the level of activity 220 mins? a) 2400 b) 2475.4 c) 2570.6 d) 3598