Jeff Brown has collected sales data for his cupcake stand. Calculate the weighted moving average forecast for period 13 with weights 0.4 and 0.3. Round your answers to 2 decimals. Time 1 2 3 4 5 6 7 8 9 10 11 12 Sales 48 41 37 32 36 31 43 52 60 48 42.0 30.7