DI Question 6 3 pts Profit analysis The total profit (in dollars) from the sale of x calendars is P(x) = 22x-0.04x2-400 Find the marginal profit of 40 calendars to approximate additional profit from the sale of the 41st calendar. (Round to the nearest 2 decimal places, if needed) DQuestion 7 3 pts Average Cost analysis A small machine shop manufactures drill bits used in the petroleum industry The manager estimates that the total daily cost (in dollars) of producing X bits is c(x) 1,000 25X - 0.35x2