Sum total with 2 conditions, but one condition is the same for all

Hello,

It is hard to tell what the conditions are. I have attached a file here. What I have is I have few companies that use the same number format and same invoice number. I need to sum the total by each company with their invoice. Since some of the invoice numbers will be the same. I need help on this. I do not know what formula that need to be used. Any help will be greatly appreciated.


Thanks

Jackson