how to calculate MAX and MIN values in BEx

Hi gurus,

I have a data in my query like this 90 records

calday Billed units consume

11/2/2013 1.8

1/3/1998 3.0

11/2/2013 0.22

1/9/1998 9.0

11/6/2013 10.00

1/4/1998 12.00

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I would like to find out on which cal day max Billed units consumed. please explain with the procedure and hoe can i use

EXAMPLE OUTPUT  calday Billed units consume

1/4/1998 12.00

Thanks in advance