The Music Express is going to buy music bundles from a company that is going out of business. The company charges different amounts for bundles of pop and rock music: Using your Equations from part A, The Music Express has $72,000 to spend on the music bundles. If it buys more pop than rock bundles, how many bundles of each type of music can The Music Express buy while getting closest to the budget of $72,000? Explain.