A dataset that contains credit card balances has a population mean of $2870 and a population standard deviation of $900. You randomly select 81 credit cards. What is the standard error for the...

A dataset that contains credit card balances has a population mean of $2870 and a population standard deviation of $900.  You randomly select 81 credit cards.   What is the standard error for the sampling distribution of the sample mean?  (give answer as a whole number / integer)