How do i solve this question? what equation am i using

Question

The demand curve for a product is p=60 - 0.0005q where p is the price per unit and q is the quantity demanded. How many units must be sold to achieve sales of 1200000?

Answer 1

P=60-.0005Q

P=60-.0005(1,200,000) = 60-600=-540, You have a negative price or pay people to take the product to get 1.2 million "sold"

.0005 = 1/2000 1/2000 x 1200000 = 1200000/2000 = 1200/2=600 60-600=-540

Price =-540