Tshirts sell for $50. Usually 400 are sold in 1 week.

if the price increases by $10, then 5 less are sold.

a. what is the usual weekly Revenue?

b. what is the equation, define the variables, convert to standard form.

c. what is the max, show using algebra

my work....

c=, s= sales in 1 week, R= revenue

"Usual" means AVerage?????

therefore average weekly sales =

__cs + (c+10)(s-5)__

2

Not really sure what my unknowns are