Hema,you cannot combine points or cash credits of ISC or IRC together. Both are independent sites (though related in the sense it is the same adm) and have independent accounts, payment programs, member levels,etc.
You need to reach the Gold level membership at IRC independent of ISC and vice-versa, to be able to apply for Google AdSense revenue sharing programs at each of the sites.
Regards,
vk
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Faith gives us the courage to tackle the seemingly impossible, as well as the determination to see it through ~ Author Unknown
Regards,
vk