Hello, this friend. According to my many years of experience in buying cakes for friends’ birthdays, a six-inch cake costs about 18 to 25 yuan. The price difference is due to the external decoration of the cake. For example, a black forest cake with fruit on the outer layer costs 23 yuan, and without it costs 23 yuan. Fruit is 18 yuan. There is also a kind of translucent cake that is popular nowadays. One made basically using pigments can be bought for about 15 yuan. I don't know if I can help you with your question.