Her average score for the 3 turns is 40 because you have to add all of the scores so -80 and -120 is -200 so add that to 320 and you get 120 divide that by 3 because she took 3 turns and you get 40
So I guess you man 15% raise! 2100×0.15=315 now that's the actual increase in pay so what he actually gets it 2100+315=2415 dollars per month more than previous month's