If you want to remove 21 040 EUR from the proposal, you will have to finance your stay in France. So the technical proposal should be modified accordingly.
To sum up, if you want to reduce the offer price, I propose you 2 options:
1) CGX is not anymore responsible of your expenses in France (as described above) so you take charge of 21 040 EUR
OR
2) We put the hardware in option. Remember that the hardware value has a duration of 1 MONTH. We cannot guarantee the price more than 1 MONTH. That is to say, the hardware price in the proposal 37 020 EUR may have changed and may be higher now.