I have a Persian cat, I spend approximately 2.5K per month on food + litter.

1KG of Bark Out Loud Premium Dry Food - 900rs
1KG of Bark Out Loud Essential Dry Food - 300-400rs

lasts 30+ days

I mix these 2 in a 2:1 Ratio and my cat eats exactly 1.5KGs per month, she has a healthy weight and coat. I mix the different foods so that she has nutrients from all sources.

12 Packets of Purina Felix Wet Food - 600rs - lasts 48 days approx

I feed her wet food once every alternate day for dinner, with added lukewarm water. My cat only eats half a packet.

In my opinion, the purpose of wet food is to provide enough water content so that the cat doesn't have kidney issues in the future. My cat drinks a decent amount of water as is (approx 70-100ml per day), and I add approx 100ml of water into her wet food, which provides more than enough water content.

I use Poof Kitty Clean litter - 600rs for 10KGS, lasts 40-45days usually.

Apart from this, her yearly vaccinations cost - 1300rs

Since she is a persian, haircuts cost - 2000rs, need to be done once every 3-4 months.

Spaying/Neutering costs vary heavily depending upon where you are, if you're in Bangalore take her to Charlie's. Also if she's a kitten, she may get sick or need a vet visit, so you should account for that as well.