hmm, i think there's a mistake on the scores.
MC score should be 500,320
4x80 =320
1x500,000=500,000
Total: 500,320
Emmerson said 100 is not enough, so it became 500k
4 x 80 should be 320, but why did he scored 370? Maybe it's a typo error from the author.
edit:
ok i get it now, his true score is 5x80=400
wtf, mc got 80 and still emmerson will give him 100 but also say it's not enough, so giving him 500k.
so basically mc score on Emmerson test, 20 mistake, 50 corect(norma), and 30 correct(special)
30points is equivalent to 500k, so he scored 500,050 on emmerson test