Ill give brainliest answer if u give a detailed thx! store g offers a lunch kit that karen likes for 10% off its regular price of $20. store h sells the same lunch kit for $18.50, before a $6.00 mail-in rebate. where should karen purchase the lunch kit? explain your reasoning. (be sure to consider the cost of postage, as well as the time and effort required to mail in the rebate request in your response.)