The positive contemporaneous comovement between aggregate inventories and sales is a well-known stylized fact that guides the assessment of models and aggregate implications of inventory behavior. This paper highlights an overlooked feature that durable input inventory movements lag sales movements by around three quarters. This lagged comovement is discernible both in the unconditional cyclical components of data and in the impulse responses to identified aggregate shocks. To assess its quantitative significance, I develop a tractable supply chain production problem that is capable of reproducing the lagged comovement. In this model, producers are required to order critical inputs from suppliers one quarter in advance and they occasionally adjust their optimal order sizes based on forecasts of their own future sales subject to information frictions. I embed the production problem into a multisector New Keynesian model with input-output relations. Following a monetary shock, relative to a counterfactual scenario in which the inventory-sales comovement is fully synchronized, the estimated model demonstrates dampened responses of aggregate output over the first year but more gradual recovery over later horizons due to the reduced sensitivity of user cost of capital with respect to real interest rate changes.