Accounting help please

Brooks Company uses the cost formula Y = $7,200 + $0,60x for the maintenance cost in department T, where X is machine hours. The July budget is based on 20,000 hours of planned machine time. Maintenance cost expected to be incurred during the month is: a. $7,200 b. $12,000 c. $12,600 d $19,200 Using the high-low method, the cost formula fix maintenance would be: a. $1.50 per unit b. $1.2$ per unit c. $3,000 plus $1.50 per unit d. $6,000 plus $0.75 per unit Breakeven sales is the level of sales a. where variable costs equal fixed costs b. where total revenue exactly equals total costs c. where sales revenue equals fixed costs d. which falls within the relevant range