How the library handles a reader's proposal to buy a book. need propose check accepted order refuse ordered refused propose-out-1 propose-out-1 proposal Duplicates are rejected. The budget is read from the finance system. check-in-2 check-in-3 check-in-4 check-out-5 proposal check-in-2 catalogue check-in-3 finance check-in-4 check-out-5 proposal-checked order-in-6 order-out-7 proposal-checked order-in-6 order-out-7 order-lines Purchases over 500 EUR need the director's approval.