Mrs Lee baked 120 pies. She packed 6 pies in each box. She sold each box of pies for $12. How much did she collect altogether if she sold all pies she baked?

Mrs Lee packed 120 / 6 = <<120/6=20>>20 boxes of pies.

Therefore, Mrs Lee collected $12 x 20 = $<<12*20=240>>240 altogether. Answer: \boxed{240}.