ElectriCo sells 5,000 light switches a month for $1 apiece. It would be willing to sell them for as little as 75 cents. Suppose the price of light switches increases to $1.10. Assuming that ElectriCo is still selling the same quantity, by how much has their producer surplus per month increased?

$500

Explanation:

Quantity sold = 5000

Minimum price seller is willing to accept = $0.75

Improved Market price = $1.10

Previous market price = $1

Current Producer surplus = market price - minimum price seller is willing to accept

= (1.10 × 5000) - (0.75 × 5000) =  5,500 - 3750

= $1750

Previous producer surplus = (1 × 5000)(previous market price) - (0.75 × 5000)(minimum price seller is willing to accept) = 5000 - 3750

= $1250

Producer surplus increased based on the difference between the current producer surplus and previous producer surplus

=1750 - 1250  = $500

answer; ///i believe the answer is (d) procedures to control the quailty of your product;

ok this has nothing to do with business