Alejandro needs to buy bird seed from the local pet store for his parrots. a 10 lb. bag of bird seed costs $12.55. the pet store also sells loose bird seed for $1.49 per pound. the sales tax is already included in these prices. alejandro wants to buy a 10 lb. bag of bird seed and some loose bird seed. if he has $20, how many pounds of loose bird seed can he buy after purchasing the 10 lb. bag?