请各位英语达人解释一下究竟是用equipment b 换成equipment f 还是相反?还有其实这句话是什么意思?Equipment B was traded in against the purchase of Equipment F on 30 June.Equipment F cost 90000; 2500 was allowed against this and the balanc
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设备B用来交换6月30日购买的设备F.
设备F花了90000元
2500元可以抵设备F的价值（理解为设备B值2500元）,其余的用现金支付.