A bank has following loan portfolio (all amount in crore taka) as of 30 June 2025 :

Total Gross loans 1500, where
Special mention accounts 400
Substandard loans 600
Doubtfull loans 300
and Bad/Loss loans 200

'For those loans. Current total provisions held = 600, Provision rules (used in this exercise) : For SMA 20% provision substandard 50% provision, Doubtful 75% provision and Bad/Loss 100% provision.

Instructions :