Bolka Corporation, a merchandising company, reported the following results for October: Sales $ 4,096,400 Cost of goods sold (all variable) $ 2,194,500 Total variable selling expense $ 238,700 Total fixed selling expense $ 144,700 Total variable administrative expense $ 238,700 Total fixed administrative expense $ 282,900 The contribution margin for October is:

Which of the statements best describes why the aggregate demand curve is downward sloping? an increase in the aggregate price level causes consumer and investment spending to fall, because consumer purchasing power decreases and money demand increases. as the aggregate price level increases, consumer expectations about the future change. as the aggregate price level decreases, the stock of existing physical capital increases. as a good's price increases, holding all else constant, the good's quantity demanded decreases.