A company sells four products, as follows:

• Product A: Price per unit: $120; Variable cost per unit: $60; 3 machine hours required.
• Product B: Price per unit: $90; Variable cost per unit: $40; 2 machine hours required.
• Product C: Price per unit: $80; Variable cost per unit: $30; 5 machine hours required.
• Product D: Price per unit: $70; Variable cost per unit: $30; 1 machine hour required.

The scarce resource in the company is machine hours.

Which product should the company emphasize in its marketing campaign?