Required A

Required B

Required C$1$

Required C$2$

Required D$1$

Required D$2$

Calculate the contribution margin per unit and the contribution margin ratio.

Note: Round "contribution margin per unit" to $2$ decimal places.

$\backslash$table$[[$Contribution margin per unit,$],[$Contribution margin ratio,$]]$Calculate the firm's operating income $($or loss$)$ if the volume changed from $10,000$ units to $14,000$ units. Note: Do not round intermediate calculations.Calculate the firm's operating income $($or loss$)$ if the volume changed from $10,000$ units to $6,000$ units.

Note: Do not round intermediate calculations.

$$Refer to your answer to part a for total revenues of $$50,000.$ Calculate the firm's operating income $($or loss$)$ if unit selling price and variable expenses per unit do not change and total revenues increase by $$15,000.$

$$