Your furniture store sells two types of dining room tables. The first, type A, costs $277 and you make a $24 profit on each one. The second, type B, costs $103 and you make a $20 profit on each one. You can order no more than 80 tables this month, and you need to make at least $1640 profit on them. If you must order at least one of each type of table, how many of each type of table should you order if you want to minimize your cost?