Help finding lowest value using multiple criterias...little different than usual

Hi folks

I need some help in this example file that i created. What im trying to do is to search for the lowest number in column E (Cons.) using two criterias (i think). So what i was hoping to do is a formula that picks the number in K4 and rounds it to look like the ones in column C (Tir.) and then it should look for that number in column C that match, and in the same time using the number in L4 to match and than search for the lowest number in column E.
Sorry but im getting some difficulties to show my problem in words (not english guy) :-(

The result expected in this example should be the value in E14 (890) because is the lowest value that match the criteria of K4 (rounding to 310) in column C and L4 (18) in column D.
Is this possible?

Thanks for the attention
Kind regards

This ARRAY formula will find the lowest value, based onthe criteria in K4...
=MIN(IF($B$3:$B$31=K4,$E$3:$E$31))
...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. Press F2 on that cell and try again.

BUT...I am unsure how you would round 311809 and get 312100??

Thanks Ford for your time.
I think i couldn't explain well. What i need is some formula that round the number in K4 like they are rounded in column C and after that it should look for the lowest value that match that number in K4 rounded, in this case after round is 310. Using this number 310 and the other one in L4 (18) than it should look in column C and D for an exact match of this two values giving me than the lowest value in column E. In this case it should be E14 because is the lowest value using 310 and 18 on the criteria. It should look for all values that match 310 and 18, in this case it should be C14 and D14,C19 and D19 to C22 and D22. What i want is the lowest value in column E that match in this selection.

Sorry for the confusion

Thanks

OK I think I understand now, You explained well, I just didnt read well LOL. Try this ARRAY...
=MIN(IF($C$3:$C$31=ROUNDDOWN(K4/1000,-1),$E$3:$E$31))

...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. Press F2 on that cell and try again.

Try this version

=MIN(IF(C3:C50=INT(K4/5/1000)*5,IF(D3:D50=L4,E3:E50)))

confirmed with CTRL+SHIFT+ENTER

Happy to help and thanks for the feedback