Adaiber begins at sea level andersons vertically at a rate of 2 1/2 ft./s per second. how long does the diver take to reach -15.6 feet?

There are a total sales of 2,000 dollars on monday on tuesday sales dropped 10% on wednesday sales dropped another 20% compared with tuesday from wednesday to thursday sales increases by an equal amount to 25% of monday total sales what is the net change in dollars on total sales from monday to tuesday