Over priced

I was at mall of Afrika last night. I ordered the Burger with the onion rings, without garnish. My mom had the double whopper with cheese. Now the price difference is R25. R25???? For 4 flat onion rings??? Now you have a Burger that is about R7 extra I think because it has Xtra garnish and sauce. But you don't charge less without it. How can you justify R25 for 4 miserable onion rings. Rhe burger itself is awsome. Service was brilliant. Even tho the guy helping us had no name tag.