Hector runs a one-product widget shop. Each month, his fixed costs, whether he produces anything or not, amount to x dollars. The marginal cost of producing and selling one widget is a constant y dollars, regardless of the number he produces. He generally can sell widgets for r dollars each. What is the minimum number of widgets he must produce, assuming he sells every widget he produces, to break even (neither make a profit nor incur a loss) in a given month? Choose the correct choice from the following options.
A) x/(y - r) B) x/(r - y) C) x D) x/r E) x/y
Two ways...   1) let t be the total number, so cost = t*y+x and selling price=t*r..   No profit no loss....t*y+x=t*r.....T=x/(r-y)...   x/(r - y)
<result>B</result>
Hector runs a one-product widget shop. Each month, his fixed costs, whether he produces anything or not, amount to x dollars. The marginal cost of producing and selling one widget is a constant y dollars, regardless of the number he produces. He generally can sell widgets for r dollars each. What is the minimum number of widgets he must produce, assuming he sells every widget he produces, to break even (neither make a profit nor incur a loss) in a given month?