SKU – Variations – Parent SKU

Hi,
I love using BEAR Bulk Editor. We’ve recently decided to change our variation SKU’s to a logical pattern. We have say 10 variations mostly size related. At the moment the SKU’s are random. We want to follow a pattern – Parent SKU ID – then a size identifier. (i.e. Parent SKU 120 – Variation SKU’s would be 120-10-8, 120-50-40 for sizes 10×8 and 50×40)
We want to know whether we can include a shortcode type something to populate all variations filtered by price to change them to %PARENTSKU%-10-8 rather than having to manually change each one? This would be amazing if possible.