A​ person's website specializes in the sale of rare or unusual vegetable seeds. He sells packets of​ sweet-pepper seeds for ​$2.16 each and packets of​ hot-pepper seeds for ​$4.40 each. He also offers a 16​-packet mixed pepper assortment combining packets of both types of seeds at ​$2.44 per packet. How many packets of each type of seed are in the​ assortment?