Shopify keeps each product's COGS as one number in your store's currency. When you buy in yuan, euros or dong, that number goes stale as exchange rates move, and your profit reports drift with it. CostBuffer stores each supplier's invoice amount in their currency, converts it with official exchange rates and updates Shopify's COGS field. It checks rates daily and updates figures that moved, or blends each new purchase with the stock you already hold. Every change is logged.

• Enter supplier invoice amounts in their currency; Shopify's COGS is set for you
• Daily official rates; COGS updates when a rate moves past your threshold
• Use today's rate or a 7, 30 or 90-day mean to smooth out swings
• Blend each purchase with stock on hand, each at its own day's rate
• Add freight and duty, see rate charts and a log of every change with its rate