CFA level1 note 5有个currency forward rate 的例子和例题 我有点没弄明白 如下

Example:
Gemco expects to receive EUR50 milion three months from now and enter into a cash settlement currency forward to exchange these euros for U.S. dollars at USD 1.23 per euro. If market exchange rate is USD 1.25 per euro at settlement, what is the amount of the payment to be received or paid by Gemco?
以下是答案:
Under the terms of the contract Gemco would receive:
EUR50 million x USD 1.23 = USD61.5 million
Without the forward contract, Gemco would receive:
EUR50 million x USD 1.25 = USD62.5 million
The countryparty would be disadvantaged by difference between contract rate and market rate in an amount equal to the advantage that would have accured to Gemco had not entered into the currency forward.
Gem co must make a payment of USD 1.0 million to the counterparty  这句话我就想不通了 为什么有合同的情况下收到的USD会少，还有向对方支付 1million ?????????

望解答，谢谢!