Ending today, Gap offers its Gap Men's Pocket T-Shirt in several colors (Red pictured) for $9.99. Stack coupon codes "FFTIME" and "BEST" to drop the price to $5.39 and bag free shipping. That's a savings of $20 and the lowest price we could find. It's available in select regular and tall sizes from S to 3XL.
You very likely are putting your laptop battery into an early grave.