Harrington Inc. had $15 million in operating current assets, $4 million in accounts payable, $2 million in accruals, and $1 million in notes payable at year's end. Given the information provide, what was Harrington's net operating working capital (NOWC) last year? Enter your answer without using the $ sign and using the format 1,000,000 instead of 1 million. Round to the nearest $.