QS $21-20($Algo$)$ Computing income from unit sales changes LO C$2$

A manufacturer's contribution margin income statement for the year follows. Prepare a contribution margin income statement if the number of units sold $($a$)$ increases by $300$ units and $($b$)$ decreases by $300$ units.

$\backslash$table$[[$Sales per unit $11,500$ units$),$$$115,000$