Cassandra manages a store that sells MP3 players. Each MX300 takes 4 hours to create the plastic pieces, 2 hours to create the electronics, and 18 hours of labor to assemble the final product. Each XL2000 requires 2 hours to create the plastic pieces, 6 hours to create the electronics, and 22 hours of labor to assemble the final product. The factory has 600 hours to create the plastic pieces, 720 hours to create the electronics, and 2960 hours of labor to assemble the final product each week. If each MX300 generates $9 in income, and each XL2000 generates $3, how many of each of the MP3 players should Cassandra have the store sell each week to make the most income?

MX300:

XL2000:

Best income: