Gretchen bought some large vases for $11 each and some small vases for $7 each on clearance. If she bought 18 vases for $142, how many large vases, and small vases did she buy? Gretchen bought 4 large vases, and 14 small vases Gretchen bought 8 large vases, and 10 small vases Gretchen bought 10 large vases, and 8 small vases Gretchen bought 14 large vases, and 4 small vases