Can you please support with the following answer and formula?

Markham Computers sells 6,200 cards of RAM, 3,300 video cards, and 2,100 power supply each year. Markham is considering adding a monitor and expects to sell 3,600 of them. If the new monitors are added, Markham expects that ram card sales will decline to 2,200 units and video card sales will decline to 1,200 chairs. Sales of the power supply will remain the same. Cards of RAM sell for an average of $70 each. Video cards are priced at $65 and the power supply sell for $55 each. The new monitor will sell for $50. What is the erosion cost?

$297,000

$409,000

$327,000

$416,500

$436,000