问答题   A business began operations with $600 in the cash till. During the first year, all sales were cash sales and $30,000 was banked. Before making any banking, sundry expenses of $500 per mouth were paid from the cash till and the owner also withdrew $200 per month from cash till for living expense. The cash in the till at the year end was $200.
    What is the cash sales figure for the year of operations?
    $______