Operating Cash Flow - Inventory

CFA Level I FRA
#1

If inventory went down from $10 (20X0) to $5(20X1) . Therefore -$5. Would this reduce the operating cash flow by 5 or increase it by 5?

Personally, I think it should increase operating cash flow by 5 since it implies that less goods were purchased than sold.

Thank you.

#2

Yes, you are completely right.

#3

I wrote a couple of articles on CFO that may be of some help:

#4

Thanks everyone. Seems that there may be a small error in the curriculum.