Here are three other things that might help you feel better: 1  Put a heating pad on the spot where your legs hurt. 2  Stretch your legs like you do in gym class. 3  Have your parent massage your legs.
On average, a PO box is going to cost anywhere from $2 for a small box in a rural area to as much as $35 per month for the largest box in a metropolitan area such as New York City. To get an exact price for what your local post office is charging, this USPS.gov page can give you the exact figures from each city.
The Priority service large flat-rate boxes measure 23 11/16 inches by 11 3/4 inches by 3 inches and 12 inches by 12 inches by 5 1/2 inches. As of 2015, the shipping cost is $17.90, unless shipping to an APO, FPO or DPO address, in which case the rate is $15.90.