Using the information in the table, calculate the operating cash flow

	2019	2020
Long-term debt	700	760
Sales Revenue	2500	3000
Tax rate	0.3	0.3
Accounts receivables	600	650
COGS	1500	2000
Interest expenses	100	200
Dividends	112	56
Depreciation	500	600
Net Fixed Assets	2400	2500
Notes payable	680	600
Inventories	800	770
Accounts payables	950	1020
Cash and marketable securities	25