The cost of flat-rate shipping based on the shipping destination of your order.
$13: AL, CT, DE, DC, GA, IL, IN, KY, MD, MI, MN, MS, MO, NH, NJ, NY, NC, OH, PA, RI, SC, TN, VT, VA, WI, WV
$13 or $30 ($13 if eligible for Ground, $30 if it must ship Air): AR, FL, IA, KS, LA, MA, ME, ND, NE, OK, SD, TX
$35: AZ, CA, CO, ID, MT, NM, NV, OR, UT, WA, WY
$50: AK, HI
More pro tips here.