A commodity will be sold at a 30% increase in cost price. Later, due to seasonal reasons, it will be sold at a 20% discount. After the price reduction, each commodity will be sold for 104 yuan. Is it a loss or a profit to sell this commodity? How much is it?

A commodity will be sold at a 30% increase in cost price. Later, due to seasonal reasons, it will be sold at a 20% discount. After the price reduction, each commodity will be sold for 104 yuan. Is it a loss or a profit to sell this commodity? How much is it?

Regarding cost price as unit "1",
The price before 20% discount is: 104 △ 80% = 130 yuan
The cost price is: 130 (1 + 30%) = 100 (yuan)
So, now this kind of commodity is sold to earn, earning: 104-100 = 4 (yuan)