Philly, I have my schweser pro from last year, and I think your right:
From Schweser:
"Under the direct method, to find cash inputs, John must add (subtract) any increase (decrease) in inventories to cost of goods sold (COGS) and then subtract (add) the increase (decrease) in accounts payable. The calculation for Soft Corporation�s projected cash flows is as follows:
90.0 + (150.0 � 100.0)- (101.0 - 91.0) = 130.0
All three of these components are necessary to find total cash inputs under the direct method, making the correct choice 130.0."
if 90 is COGS, then its shoud be a negative number.
Also, Add (subtract) any increase (decrease) in the accounts payable balance.
Subtract (add) any increase (decrease) in the inventory balance. So, I think the above it written incorrectly.