Would you help me to correct these sentences in English? THANKS!?

Question

1.The guide should tell the tourist the time and announcement about shopping. The guide should introduce the characteristic of local products and interpret for the tourists. If possible, the guide may help checking for shipment.
2.If the peddler forces the tourists to buy his products, the guide should remind the tourists not to be cheated.
3. If the shop isn't responsible for its products,the guide should reflect it to certain department, in order to protect the rights of tourists.
4.The guide should take the tour group shopping only at shops designated by contract. The local guide is not permitted to add extra shops or shopping time.
5.Do not ask for rake-off.

Answer 1

OK Angel.
1) The guide should tell the tourists the amount of time available for shopping. The guide should give details of local products, interpret for tourists and, if possible help with checking for shipment.
2) [no-one can force tourists to buy] If the peddler is insistent, the guide should warn the tourists about being cheated.
3) If the shop is not responsible for its products, the guide should ensure that the rights of tourists are protected by referring them to the appropriate departments.
4) is OK
5) is OK. Hope this helps.

Answer 2

1. THE TOUR GUIDE WILL BE EXPECTED TO PERFORM THE FOLLOWING DUTIES:

1. Inform the tourist as to the time allotted for shopping.

2. Provide a summary of the local products available, assisting the tourists whenever necessary. This includes translations and special services such as arranging for shipment to their home countries, warning them about overly forceful, dishonest peddlers and goods that can't be returned if defective.

3. Only the shops under contract will be permitted for shopping. The tour guide is not allowed to extend the time for shopping or include other vendors.

Sorry, but what's a rake-off?