Cost price vs. sale price

Cost price vs. sale price

Hello, I'm fairly new to Zoho CRM and struggling to understand the "unit price".
I see we have "vendors" = suppliers, and "accounts" = buyers/customers, is that right?
But the products only have one price, the unit price. How does that make sense? The prices at which I buy a product from a vendor and re-sell it to the customer naturally have to be different. Is there a way to have different prices and allocate the right price to the various functions, e.g. cost price to purchase orders and resale price to sale orders?
Thanks