A small local retail store carries three products $($SKUs A$,$ B$,$ and C$)$ that collectively account for over $80\%$ of the retailer's annual sales. As such, the store manager wants to pay greater attention to the efficient and effective management of these SKUs' inventories. Please see the demand, lead time, and cost information provided in the next tab. Based on this information, and assuming that these SKUs are managed using an optimal R$,$ Q model, please answer the following questions: