Q:  How to view the products that the customer has bought before on MC Boss?

A: On MC Boss  → Tap Client → Select a customer → Tap “Product history” → Select date range → View Product history list 

Q: For repeat customers, how to view the historical selling prices?

A: On MC Boss  → Tap Product → Select a product → Tap “Client”→ Select “ClientA” → Tap" Product history" → Select product reference → View product details