Help required in comparing two dates and select before date

[A9kurs]

Hi friends

on Cell C2 i want that it should compare the date b2 with i column with match of its PO and which one is before the b2 it display result which is cost corresponding to selected date.
c2 Should be 10$ as b2 is 01/02/19 so it compare the PO and compare the date "B2" with i2, i3, 14 and select the date which is i2 as it is before b2.

Thanks in advance

[benishiryo]

try this array formula:
=INDEX($J$2:$J$7,MATCH(A2&"_"&MAX(IF($H$2:$H$7=A2,IF($I$2:$I$7<B2,$I$2:$I$7))),$H$2:$H$7&"_"&$I$2:$I$7,0))

...confirmed by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. You will know the array is active when you see curly braces { } appear around your formula. If you do not CTRL+SHIFT+ENTER you will get an error or a clearly incorrect answer.

[A9kurs]

This seems max but I want min

try this array formula:
=INDEX($J$2:$J$7,MATCH(A2&"_"&MAX(IF($H$2:$H$7=A2,IF($I$2:$I$7<B2,$I$2:$I$7))),$H$2:$H$7&"_"&$I$2:$I$7,0))

...confirmed by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. You will know the array is active when you see curly braces { } appear around your formula. If you do not CTRL+SHIFT+ENTER you will get an error or a clearly incorrect answer.