Supply Average + Contract (White Giant)

If i have a supply stock of say, 10,000 services at 100Q in my corporation and it uses 1,000 / month.

I contract 1000 at 200Q to meet this demand. If this corp runs at 100% it's supply will obviously not change.

My question is, will it use any of this 10k 100Q supply or will it use the contracted 200Q supply first? or mix?

The reason I ask is I assume the average supply quality is based on the complete stock, thus if it would only use the 200Q each month and leave the 100Q in stockpile, the 100Q will drag my average down by just sitting there and never be used.

Did that make sense?

Pretty sure it will 'mix in' and so the quality will be a weighted average of the two supplies.

Thanks

I have watched this and Crafty is right. It will evemtually get to 200 q, but it takes longer than you would think.