i work odoo 13 .

i want to know how sales unit communicate to purchase unit or on the contrary.

example: one quotation created and create RFQ base on it.

after receive price from vendors we want to say to sales unit that this products have this prices,sales unit after calculate sales price and update quotation send to customer ,customer maybe confirm some of products and (line 2,4,5,19 )order to purchase those,so sales unit must communicate to purchase unit to purchase just those products,and confirm rfq for those

Now how dose work this connection between different units ??

basically odoo has approach for this problem without customize or not??

what is standard work flow for this?