Castle Windows is a small company that installs windows. Its cost structure is as follows: Selling price from each window installation $ 600 Variable cost of each window installation $ 500 $ 190,000 40% Annual fixed costs Tax rate Calculate the number of windows Castle Windows must install and the revenues needed to earn a target net income of $72,000. Begin by determining the target operating income needed to earn a net income of $72,000. First, select the formula labels, then enter the amounts and calculate the target operating income. (Enter any percentages as a decimal to two places.) Target operating income = Next, calculate the number of windows Castle Windows must install to earn a target net income of $72,000. Begin by selecting the formula labels, then enter the amounts and calculate the number of units required to be sold. + + ) Number of units = required to be sold = Finally, calculate the revenues needed to earn a target net income of $72,000. Select the formula labels, then enter the amounts and calculate the revenues needed. Revenue required to achieve target