An Uber driver, John, estimates that his monthly fixed cost, including car depreciation, car loan interest payment, and regular maintenance cost, is $$1800.$ On average, he receives $$62$ for each ride he accepts. The variable cost is $$38$ per ride, which is calculated based on the average fuel cost and'John's desired wage rate. If your answer is a negative number, place a negative sign in front of the number instead of using parentheses.

a$.$ How many rides does John have to accept per month in order to break even? $($one decimal point$),$

b$.$ What is John's profit if he accepted $280$ rides in a month? $ $($two decimal points$)$

c$.$ How many rides John needs to accept in order to collect a profit of $$2600$ per month?

$($one decimal point$)$