I have 15,000 products in my store. My supplier sent me a CSV File (via Filezilla) which is updates the products available hourly.
To Update my inventory levels.
1. Download Export my Products from Shopify to a CSV File
2. Download the updated Inventory File on Filezilla.
3. Updating my inventory levels manually by copying the data from the from my CSV files and pasting them on the Shopify CSV File
4. Then import that CSV File to Shopify

It's an impossible task and extremely time-consuming. We would purchase the Inventory Software available, but we're a small business they're all way to pricey.

Is there a way to Automatically update inventory quantity, price on my store using an excel spreadsheet or using Filezilla?