Every time you restock a product — buying more units to sell — that's an inventory purchase. Recording it on Catlog does more than just update your stock count. It keeps your cost prices accurate, your profit calculations honest, and your purchase history visible.
What Inventory Purchase Management Is
Instead of manually adjusting stock numbers, you record a purchase: what you bought, how many units, and what you paid. Catlog takes it from there — updating your stock levels and recalculating your cost price automatically.
Weighted Average Cost Price
Here's the problem inventory purchases solve: the cost of buying the same product changes over time. One month you buy a bag of rice at ₦50,000. Next month the same bag costs ₦58,000. If your cost price is fixed, your profit calculations are wrong half the time.
Catlog uses weighted average cost price to handle this. Every time you record a purchase, it recalculates your cost price by factoring in:
The quantity you currently have in stock
The current cost price
The new quantity you just bought
The price you paid for the new batch
The result is a blended average that reflects what you've actually paid across all your stock — not just the latest batch or the first one.
This means your profit calculations stay accurate even as your purchase prices fluctuate, without you having to manually update anything.
Updating Your Selling Price
When you record a purchase, you also have the option to update the selling price for that product. This is useful when rising costs mean you need to adjust what you charge customers — you can do it in the same flow, at the moment you're already thinking about it.
Purchase History
Every inventory purchase you record is saved. Over time, this gives you a clear history of:
When you restocked each product
How many units you bought each time
What you paid per unit across different purchases
How your cost prices have evolved
This history is useful for negotiating with suppliers, understanding your restocking patterns, and spotting when your purchase costs are creeping up.
Works at Product and Variant Level
Inventory purchases work for both simple products and products with variants. If you sell a shirt in multiple sizes, you can record purchases separately for each size, and the weighted average cost price is calculated independently per variant.
💡 Inventory purchases are how your cost prices stay honest over time. Without them, you're either manually updating prices after every restock (and probably forgetting to) or running on outdated figures that make your profit look better or worse than it is.