I keep seeing Ads for Rs 20 brokerage for 1 lot of F &O
But in practice is seems to be much more
Even when I calculate in Zerodha Brokerage it seems much higher
I tried to replicate 1 lot of F & O and an equivalent 250 shares in cash market
I considered selling and buying at the same cost  Say Reliance at Rs 2500.
So I bought and sold at Rs 2500 producing no Profit or Loss. The only cost is the brokerage
This is my finding about total brokerage (including taxes, etc) :
RELIANCE (Buying and selling 250 shares in cash market  INTRADAY)  Rs 274.09
RELIANCE (Buying and selling 250 shares in cash market  DELIVERY)  Rs 1395.89
RELIANCE (Buying and selling 1 lot of Futures  Rs 154.45
RELIANCE (Buying and selling 1 lot of Option  Buying & Selling at Rs 60)  Rs 74.44
RELIANCE (Buying and selling 1 lot of Option  Buying & Selling at Rs 2500)  Rs 1161.95
(IMAGES BELOW)
…
All are much above Rs 20 (brokerage per lot) as advertised by Zerodha and every other company ?
So can anyone tell me what TOTAL brokerage (Inclusive of taxes, Stamp duty and all other charges I have to pay in the following conditions
NORMAL ORDERS

Buying and selling one lot of Futures

Buying and selling 5 lots of Futures in one single order

Selling (shorting) and Buying back of 1 lot of Option

Selling (shorting) 1 lot of Option and letting it expire worthless

Selling (shorting) and Buying back 5 lots of Option (in 1 order)

Selling (shorting) 5 lots of Option (in 1 order) and letting them expire worthless

Buying (going long) 1 lot of Option and selling it later

Buying (going long) 1 lot of Option and it expires worthless

Buying (going long) 5 lots of Option (in one order) and selling it later (in 1 order)

Buying (going long) 5 lot of Option (in 1 order) and they expires worthless
INTRADAY (MIS) ORDERS & ORDERS ON EXPIRY DAYS

Buying and selling one lot of Futures

Buying and selling 5 lots of Futures in one single order

Selling (shorting) and Buying back of 1 lot of Option

Selling (shorting) 1 lot of Option and letting it expire worthless

Selling (shorting) and Buying back 5 lots of Option (in 1 order)

Selling (shorting) 5 lots of Option (in 1 order) and letting them expire worthless

Buying (going long) 1 lot of Option and selling it later

Buying (going long) 1 lot of Option and it expires worthless

Buying (going long) 5 lots of Option (in one order) and selling it later (in 1 order)

Buying (going long) 5 lot of Option (in 1 order) and they expires worthless