When the price of a gizmo is $50, 100 gizmos are sold. when the price of gizmos is $60, 120 gizmos are sold. using the midpoint formula, the price elasticity of demand is equal to?

answer; /// i believe the correct answer is (all of the above);

you have to put the parentheses like this:

in fact, you have to perform the operation inside parentheses first, and then proceed in order:

answer; no individual buyer or seller has any significant impact on the market price;