Li and jen went shopping. • li bought 5 pairs of earrings and 1 necklace for a total of $68. • jen bought 1 pair of earrings and 2 necklaces for a total of $55. each pair of earrings cost e dollars and each necklace cost n dollars. which system of equations can be used to find the cost, in dollars, of each pair of earrings and each necklace? a. 5e + n = $68 e + 2n = $55 b. 5e + n = $68 2e + n = $55 c. e + 5n = $68 e + 2n = $55 d. 5e + 2n = $68       e + n = $55