You must be glad to know that karbon card supports overseas ATM cash withdrawal , however there are some charges associated with it.
For Cashback Card
INR 100 +18% GST = INR 118
for 2 withdrawal INR 200 + 18% GST = INR 236
The fee will be charged on per cash withdrawal.
For Standard Card
1.75% or INR 250 ( whichever is higher) plus 18% GST per cash withdrawal transaction
If withdrawal amount is INR 50,000
1.75% of INR 50,000 =INR 875
18% of INR 875 = INR157.5
so the total charges will be INR 1032.5 for the withdrawal of INR 50,000
If withdrawal amount is INR 10,000
1.75% of INR 10,000 =INR 175
18% of INR 175 = INR 31.5
so the total charges will be INR 206.5 for the withdrawal of INR 10,000
But you will charged INR 250 as INR 250 is higher than INR 206.5
For Booster Card ATM cash withdrawal is not available