Here is the curent tableau

		x	y	z	s	t	u	p		Ans
	s	0	1	3	2	1	0	0		70
	x	2	1	-1	0	-1	0	0		10
*	u	0	-1	1	0	0	-1	0		10
	p	0	-2	-2	0	0	0	1		10

Since Row 3 is the only starred row (and so it is the first starred row) we locate the largest positive number in Row 3 (it is the "1" in the z-column), giving us the pivot column (shown in red):

		x	y	z	s	t	u	p		Ans
	s	0	1	3	2	1	0	0		70	Test Ratio: 70/3
	x	2	1	-1	0	-1	0	0		10
*	u	0	-1	1	0	0	-1	0		10	Test Ratio: 10/1
	p	0	-2	-2	0	0	0	1		10

Since the smallest test ratio is in the u-row (Row 3), we select the entry in Row 3 Column 3 as pivot.

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