Answer to Question #219380 in Macroeconomics for Mr Johnsmart

Question

a good cost a basics #180 a unit but if an order is made for more than 10units, the price is reduced by a discount of #2 for every 1unit increase in the size of an order (up to a maximum of 60units purchased), i.e. if the size is 11, price is 178; if it is 12, price is #176 etc. write an expression in term of order size and simplify it. assume order size is between 10 & 60 units

Answer 1

$q(180-2(q-10))$

$=180q-2q^2+20q$

$=200q-2q^2$