Answer:
The crossover point for Time

Explanation:
From the question we are told that
The total rooms rented for the year is

Time's fixed cost is r = $61,000
Time's variable cost is
$12.5 per room
Duffy's Maid Service fixed cost is
$25,000
Duffy's Maid Service variable cost is
$18.00 per room
The cross over point for Time is mathematically represented as

substituting values

