The monthly Income Statement columns of a worksheet are below, but bookkeeper only uses account numbers in the world. The account names are missing: Account 401 407 Dr Cr 7,200 1,800. 4,000. 2.600 6,600. 9,000 519 570 Total If correct, the firm this month O Has a net income of $3,600 O Has a net loss of $ 2,400 Has a net loss of $ 9,000 Has a net income of $ 2.400 O Has a net loss of $ 6,600