Macy's offers the Weatherproof Vintage Men's Button Mock-Neck Sweater in Navy for $13.96. Opt for in-store pickup to avoid the $9.95 shipping charge. That's $66 off and the lowest price we could find. It's available in sizes from S to 3XL. Note that although Macy's pictures a different color, this is offered in Navy.
Teaching can be tough, but the life of a K-12 educator depends a lot on where you live.