The Morrison Audio Co$.$ makes stereo speaker assemblies. They purchase speakers from a

speaker manufacturing firm and install them in their own cabinets. Morrison's model$-110$

speaker assembly, $M_1,$ which sells for $$200$ has a tweeter and a mid$-$range speaker. Their

model$-330$ assembly, $M_2,$ which sells for $$350,$ has two tweeters, a mid$-$range speaker, and

a woofer. Morrison currently has in stock $90$ tweeters, $60$ mid$-$range speakers, and $44$ a

woofers. The company would like to maximize its revenue.