How much did sewing machines cost in 1940?

In 1923, with a down payment of $4 down ($48.49 in today's money), one could buy a Damascus Vibrating Shuttle sewing machine on a $4 monthly installment plan until it is paid off at a price of $29.95 (that's $363.08 in today's money). If you were able to pay in cash, the price would be only $27.95 ($338.83 in today's money). The machine was manually powered by the large pedal at the bottom.