Sushi

I usually have sushi every Wednesday as it is half price, but decided to treat myself today for some lunch. I was quite taken aback when the bill came to R200 for 10 pieces. I would understand if the sushi was extravagant or fish based, but being vegan, it’s simply rice and avo. So why am I being charged the same price as all the other salmon/prawn based sushi? I don’t think this is fair to be honest...