Yes, actually there is, however, it's not called invoices, the line is called income. When you go to the lefthand side black toolbar and select the work projects. That brings you into the hub where you see the activity of all your projects. When you look at that screen the bar graph shows one line for income and another for cost. Your income line does show the total income made on the project. For you to see the invoices related to that income click into that project and you'll see several tabs one is overviews and that showcase an income column.  From this point on you get no graphs but that column you can interact with it by click on any income line to see what invoices make up that income. Or you can go into the transactions tab to see what invoices were created under that project too. Hope this information points you in the right direction.