I am sorry to reply you so late.
Please the following steps:
1.Open Infopath Designer >> FILE >> select Blank Form(InfoPath Filler) option under New tab >> click "Custom Table" under INSERT tab >> create 3(rows)*2(columns) table
2.Click "Manage Data Connections..." in the lower right corner >> click "Add" button >> create a new connection to receive data (Product)
3.On the second row, add the Repeating Section, and then create a 4(rows)*2(columns) table in the Repeating Section.
Fields detailed properties settings:
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4.Click "Manage Data Connections..." in the lower right corner >> click "Add" button >> create a new connection to submit data (Quote)
5.Click FILE tab >> Publish >> SharePoint Server(Publish form to a SharePoint Library) >> create a new form library named "Queto"
6. Go to Queto Library >> click New to create new form

Thanks,
Echo Du