Assume $f(x)$ is continuous on $(-,).$ Use the given information to sketch the graph of $f.$

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f

Choose the correct graph below.

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A deli sells $960$ sandwiches per day at a price of $$8$ each. Assume that the deli does not want to increase the price.

$($A$)$ A market survey shows that for every $$0\mathrm{.}10$ reduction in the price, $40$ more sandwiches will be sold. How much should the deli charge in order to maximize revenue?

The deli should charge $ for a sandwich to maximize revenue.

$($Round to the nearest cent as needed.$)$

$($B$)$ A different market survey shows that for every $$0\mathrm{.}20$ reduction in the original $$8$ price, $10$ more sandwiches will be sold. Now how much should the deli charge in order to maximize revenue?

Now the deli should charge $ for a sandwich to maximize revenue.

$($Round to the nearest cent as needed.$)$