hello can we do part invoice for example if a customer bought

item A x5 

Item b x5

can i generate 2 invoice 

Invoice 1 for item A x2 Item Bx4

Invoice 2 for TItem Ax3 item Bx1

reason for that is , we want to generate invoces as customers reciieves thier deliver, in our model , some item can be shipped st away and some get shipper when we recieved it from our vendors , 

our costomer wants to get invoiced as he recieved his items