A contribution income statement for the Nantucket Inn is shown below. $($Ignore income taxes.$)$

Revenue $ $1,350,000$

Less: Variable expenses $754,000$

Contribution margin $ $546,000$

Less: Fixed expenses $455,000$

Net income $ $91,000$

$1.$ Show the hotel$$s cost structure by indicating the percentage of the hotel$$s revenue represented by each item on the income statement.

$2.$ Suppose the hotel$$s revenue declines by $20$ percent. Use the contribution$-$margin percentage to calculate the resulting decrease in net income.

$3.$ What is the hotel$$s operating leverage factor when revenue is $$1,350,000?$

$4.$ Use the operating leverage factor to calculate the increase in net income resulting from a $25$ percent increase in sales revenue.