The cost and revenue functions for producing and selling x units of a product are given. Cost and revenue are expressed in dollars.

Upper C left parenthesis x right parenthesis equals 105 x plus 64 comma 480

Upper R left parenthesis x right parenthesis equals 235 xa.

Find the number of units that must be produced and sold to break even. At this level, what is the dollar amount coming in and going out?

b.

Write the profit function from producing and selling x units of the product.