2b.) The students in Naomi's class earned \( 20 \% \) of the selling price of each calendar sold this year and last year. . At last year's selling price, Naomi's class sold 650 calendars. Fill in the blanks to correctly complete the statement. The students in Naomi's class earned more money by \( \$ 28 \). 800 calendars.

Last year, at the selling price of each calendar, Naomi's class earned a total of \( 0.20 \times 650 \times \text{price} \). This year, if the selling price increased leading them to sell 800 calendars, their earnings would be \( 0.20 \times 800 \times \text{new price} \). The difference in their earnings, given they earned $28 more this year, can be expressed in an equation: \( 0.20 \times 800 \times \text{new price} - 0.20 \times 650 \times \text{price} = 28 \). Thus, after finding the new selling price and performing some simple calculations, we can conclude that the students in Naomi's class earned $28 more this year by selling an additional 150 calendars!