When do they have to finish their work by?

M: It’s already Tuesday morning and we still got a lot of things to be done before the boss gets back. Have you checked the e-mails yet? Anything from Mr. Hong regarding the recent merchandise shipments?
W: He faxed us the revised shipping documents instead.
M: That’ s fine. Why don’t you check the new freight rate on the invoice first and put a copy on the boss’s desk? By the way, the boss is still expecting a couple more proposals by the end of this week. Do you have any new ideas?
W: I’m still working on the market research, which has been bugging me since last week. The boss has never really approved this yet.