the williams trunk company makes trunks for the military, for commercial use, and for decorative pieces. each military trunk requires 4 hours for assembly, 1 hour for finishing, and 0.1 hour for packaging. each commercial trunk requires 3 hours for assembly, 2 hours for finishing, and 0.2 hour for packaging. each decorative trunk requires 2 hours for assembly, 4 hours for finishing, and 0.3 hour for packaging. the profit on each trunk is $6 for military, $7 for commercial, and $9 for decorative. if 4600 hours are available for assembly work, 2100 for finishing, and 180 for packaging, how many of each type of trunk should be made to maximize profit?