The upper class in the 2010 survey had household net worth between $1,345,975 and $7,402,095. Money kept

Question:

The upper class in the 2010 survey had household net worth between $1,345,975 and $7,402,095. Money kept in checking accounts earns no interest but are kept to pay bills. Estimate the mean amount held in checking accounts by households in the upper class (CHECKING).