Nabors, Inc. 2018 statement of comprehensive income ($ in millions)

Net sales

$9,610

Less: Cost of goods sold

6,310

Less: Depreciation

1,370

Earnings before interest and taxes

1,930

Less: Interest paid

630

Taxable Income

$1,300

Less: Taxes

455

Net income

$845

Nabors, Inc. 2017 and 2018 Statement of financial positions ($ in millions)

2017

2018

2017

2018

Cash

$310

$405

Accounts payable

$2,720

$2,570

Accounts rec.

2,640

3,055

Notes payable

100

0

Inventory

3,275

3,850

Total

$2,820

$2,570

Total

$6,225

$7,310

Long-term debt

7,875

8,100

Net fixed assets

10,960

10,670

Common stock

5,000

5,250

Retained earnings

1,490

2,060

Total assets

$17,185

$17,980

Total liab. & equity

$17,185

$17,980

What is the operating cash flow for 2018 ($ in millions