$ Millions Feb. 3, 2019 Jan 26, 2018 Operating assets $42,225 $40,934 Nonoperating assets $1,778 $3,595 Total assets $44,003 $44,529 Operating liabilities $16,679 $16,047 Nonoperating liabilities $29,202 $27,028 Total liabilities $45,881 $43,075 Net sales $108,203 Operating expense $92,673 before tax Net operating profit $15,350 before tax (NOPBT) Other expense $974 Income before tax $14,556 Tax expense $3,435 Net earnings $11,121 Compute Net Operating Assets (NOA)