Spreadsheet modeling can be used for determining the quantities needed for a specific model and the type of products needed. You mentioned ABC Bikes struggled with managing stocks, with certain models overstocked and others continually running out. Circumstances that may impact sales trends are time of year, gas prices, and school sessions. For example, when gas prices increase, bike sales may increase. Also, when the weather becomes cooler or when it starts to snow, bike sales may decrease. Understanding customer needs and demographic can also optimize operations