John and Mei are selling cookie dough for a school fundraiser. Customers can buy packages of sugar cookie dough and packages of gingerbread cookie dough. John sold 7 packages of sugar cookie dough and 3 packages
of gingerbread cookie dough for a total of $106. Mei sold 7 packages of sugar cookie dough and 4 packages of
gingerbread cookie dough for a total of $118. Find the cost each of one package of sugar cookie dough and one
package of gingerbread bookie dough.