Suppose Morrisville DSL sells internet service to 10,000 households at a price of $45/month

(Total Revenue = $450,000) TR = Total Revenue.

Also suppose they knew they can add 1000 customers if they cut their price by $2/mo.

(TR = $43 x 11,000 = $473,000) TR = Total Revenue

Please figure MARGINAL REVENUE and show step by step work.

PROFESSOR SAYS ANSWER IS $23,000. I AM GETTING $23.

PLEASE EXPLAIN ANSWER STEP-BY-STEP