After tallying the receipts for their first year of operation, the owners of the Taco Barn are encouraged. Sales of their artisanal tacos, made from such exotic ingredients as ground beef, cheese, and beans, have been strong and seem to give hope to the coming year. Taco sales by month are shown in the table.

January - 474

February - 485

March - 501

April - 588

May - 579

June - 673

July - 594

August - 679

September - 608

October - 699

November - 732

December - 732

Armed only with his fingers, the owner decides that the safest forecasting approach is a weighted moving average using 0.6, 0.3, and 0.1 for the most recent three. Generate a forecast for the year using this technique and then calculate the forecast errors using MSE. What is the mean squared error for this forecasting approach?

A) 5033

B) 3960

C) 4076

D) 3466