Inventory Stock Extension?

Some store owners such as myself take inventory and add rapidly changing stock frequently.

In OpenCart, it is laborious to open one product at a time, edit the stock quantities for each option, then add all the option quantities together to get the overall stock quantity for that product.

It would be very helpful and save a lot of time if there were an extension that would list each product and its options, and allow one to edit the stock quantities (and possibly changing prices) quickly within that list.

Last year I used the extension Option Stock Manager, which worked well and did what I described above, using AJAX to update the database on the fly. However, this year (2015), using OpenCart 2 instead of OC 1.5, Option Stock Manager has several issues that have caused me to look for an alternative.

Can anyone recommend a good extension for quickly editing and updating stock quantities (and possibly prices) for products and their options?

Thank you.