Use the following adjusted trial balance to calculate the balance of the retained earnings account after closing entries.

$\backslash$table$[[,$Debit,Credit$],[$Cash$,20,],[$Accounts receivable,$12,],[$Equipment$,200,],[$Accounts payable,,$13],[$Notes payable,,$50],[$Common stock,,$30],[$Retained earnings,$2,100],[$Sales revenue,L$,150],[$Cost of goods sold,$68,],[$Wage expense,$28,],[$Depreciation expense,$5,],[$Dividends$,10,]]$