What will the price be if they buy 30? Which is the house for sale?

M: They are exactly what we need. The only problem is the price.
W: How much do they cost?
M: $60.
W: If we buy 30, what discount will they give us?
M: 10%.
W: What if we bought 100?
M: We’d get a higher discount, but we’d never be able to sell them all.

W: Is that the house that Mark Smith is going to sell?
M: Yes, it is a two-story house, with three bedrooms and two bathrooms.
W: Does it have a garage?
M: Yes, it has a two-car garage.
W: How much does it cost?
M: The price is right, only 300,000 dollars. It is a real bargain.