"What can I pay you" or "What can I give you." This can be made more explicit. Alternate translation: "What can I pay you so that you stay and work for me" (See: [[rc://en/ta/man/translate/figs-explicit]])
The connecting word "But" can be used at the beginning to show that what Jacob is about to say contrasts with what he just said. Alternate translation: "But if you will do this thing for me" (See: [[rc://en/ta/man/translate/writing-connectingwords]])