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?

问题描述:

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 balance paid in cash.

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.谢谢你的回答 请问设备F的成本就是90000-2500= 87500??设备F应该是90000,但因为B可以抵2500,所以现金支付87500