Hello Sir,
Hope you doing well.
Yes I have read your project specification and i understand that you want ability to import products into virtuemart as these products you have exported from your accounting software.
And there is 12000 products for now in file with columns product name, sku, short description, category, price, qty avail.
Ok and we need to import in Virtuemart products and there is already the products is available then simply we need to update stock and price and if it is new product then we need to create new entry of that product.. ok i got the point.
Ok we will create custom extension at backend, and from there you simply need to upload the file when you want to upload products from your software to website, and it will do the executions of update and add new products.
and yes what file format you have as exported from software ? if it is csv then it would be better to reading file and importing on website.
Ok don't worry about the quality of work and on time work, we will delivery you better output that's the promise from mnwebsolutions.
You can take review on my profile we have done many job with custom extensions and we have best feedback from client :)
I am exciting for the job, I am waiting for your positive response.
Thanks In Advance
mnwebsolutions