Table:
($ in millions)

For the year ended December 31:	2019	2018	2017

Cost	$100	$82	$91

Selling, general and administrative	453	361	384

Research, development and engineering	126	67	59

Pre-tax stock-based compensation cost	679	510	534

Income tax benefits	(155)	(116)	(131)

Net stock-based compensation cost	$524	$393	$403

Could you calculate the row number and column number in this table? Provide the final answer in the JSON structure, using the format {"row_number": "m", "column_number": "n"}.

This table has 8 rows and 4 columns. Thus, the final answer is {"row_number": "8", "column_number": "4"}.