1、存保證金
借:其他貨幣資金--保證金戶300·········································開500萬承兌保證金(500*60%)
貸:銀行存款--a戶 300
2、6個月到期保證金戶轉入壹般戶
借:銀行存款--a戶300
貸:銀行存款--保證金戶300
3、到期付款········································································因為合同約定貨款為500萬
借:應付賬款--材料款500
貸:銀行存款--a戶500
開出承兌後,找妳的供應商蓋章,讓他幫妳貼出錢來就可以了