Athenian Venues Inc. just reported the following selected portion of its financial statements for the end of 2020. Your assistant has already calculated the 2020 end-of-year net operating working capital (NOWC) from the full set of financial statements (not shown here), which is $23 million. The total net operating capital for 2019 was $38 million. What was the 2020 net investment in operating capital?

Athenian Venues Inc.: Selected Balance Sheet Information as of December 31
(Millions of Dollars)
2020
Assets
Cash	$	3
Short-term investments		7
Accounts receivable		12
Inventories		18
Total current assets	$	40
Net plant and equipment		46
Total assets	$	86