24) The phone bill for an accounting firm consists of both fixed and variable costs. R to the 4-month data below and apply the high-low method to answer the question. Minutes Total Bill $3,000 460 January 200T $2,675 February 160 $2,625 March 300 $2,800 April What is the variable cost per minute? B) $1.08 D) $0.58 A) $1.25