looks like circular refference but didnot work

Question

I have 3 columns. Income(column E), expenses(column F) and remainder(column G). Income(column E) - to use this column to input income value; Expense(column F) - to use this column to input expense value;

I want to calculate G column only each time I enter income and expenses with such formula(example): G2=G2+E2-F2