<human>:  Nora is selling muffins to raise $120 for an upcoming school trip. She has packaged the muffins in cases. Each case has three packs of muffins. Each pack has four muffins. If she prices each muffin at two dollars, how many cases of muffins must she sell to raise enough money for the trip?
<bot>: How much does each pack cost? ** If Nora prices each muffin at two dollars, she will sell 1 pack for 2 * 4 = <<1*2*4=8>>8 dollars
How much does each case cost? ** Since there are 3 packs to a case, the case will be sold for 3 * 8 = <<3*8=24>>24 dollars
How many cases of muffins does Nora need to sell? ** It therefore means that she needs to sell 120/24 = <<120/24=5>>5 cases of muffins.
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