Yesterday, a person took a piece of 100 yuan and went to the store to buy something for 25 yuan. The shopkeeper took the 100 yuan and went to the peddler next door to exchange it for 100 yuan in change because he didn't have any change. 75 yuan. The man left with 75 yuan. After a while, the peddler next door found the owner and said that the 100 yuan just now was fake money. The owner looked carefully and found that it was fake money. The shopkeeper had no choice but to find another real 100 yuan to give to the vendor. Question: In the whole process, if the cost and profit of the goods are not included, how much money did the shop owner lose in total?
昨天，有一人拿了一张100元钱到商店买了25元的东西，店主由于手头没有零钱，便拿这张100元钱到隔壁的小摊贩那里换了100元零钱，并找回那人75元钱．那人拿着75元钱走了．过了一会儿隔壁小摊贩找到店主，说刚才那100元是假钱，店主仔细一看，果然是假钱．店主只好又找了一张真的100元钱给小摊贩．问：在整个过程中，如果不计商品的成本和利润，店主一共亏了多少元钱？
<gadget id="calculator">25 + 75</gadget>
<output>100</output>

<result>100</result>