Do vegetarians pay more in a restaurant viz a viz a non-vegetarian

It looks to be true if you compare some of the rates at restaurant. For example if you took a sample of restaurants and compared the vegetarian and non-vegetarian item rates, overall the non-vegetarian rates will be 20% more than the vegetarian's rates.

But if you look at the costs of chicken which comes to be around 60 Rs/kg, Lamb Rs 200/kg, Fish 80-200 Rs/kg, the average comes to Rs 130/kg, whichever way you see, the rates are way costlier by almost 200% than you would need to make a decent vegetarian meal.

I guess restaurants wouldn't want to show that much of price differential for vegetarians and non-vegetarians. So if you are a vegetarian you are shelling out more every time you eat out.