Answer:
Han gets 15$ every 300 envelopes -> Han gets $1 every 20 envelopes
Claire gets $40 every 400 envelopes -> Claire gets $1 every 10 envelopes
A. Claire would make $150 after stuffing 1500 envelopes and make $75 more than Han (Twice the amount)
B. 2:1 Claire being 2 and Han being 1
C. Claire gets paid more in their job. Han does 20 envelopes and gets 1 dollar and Claire does 20 envelopes but gets 2 dollars.