Todrick Company is a merchandiser that reported the following information based on $1,000$ units sold:

Sales $ $300,000$

Beginning merchandise inventory $ $20,000$

Purchases $ $200,000$

Ending merchandise inventory $ $7,000$

Fixed selling expense $?$question mark

Fixed administrative expense $ $12,000$

Variable selling expense $ $15,000$

Variable administrative expense $?$question mark

Contribution margin $ $60,000$

Net operating income $ $18,000$

Required:

Prepare a contribution format income statement.

Prepare a traditional format income statement.

Calculate the selling price per unit.

Calculate the variable cost per unit.

Calculate the contribution margin per unit.

Which income statement format $($traditional format or contribution format$)$ would be more useful to managers in estimating how net operating income will change in response to changes in unit sales?