Top 3 values and corresponding attributes

[#1]

I'm fairly new to Qlikview and I need help with an expression.  I have a table box where I have values for product, source  and destination and costs associated... I need expression for a chart which will calculate the three cheapest costs separately and then another expression that would be give me the source for those 3 cheapest costs separately... If you could point me in the right direction or give me some help, I would greatly appreciate it.

This is what the table box essentially looks like....

Product	Source	Destination	Cost
Handbag	A	A1	10
Handbag2	B	B1	20
Handbag3	C	C1	30
Handbag4	D	D1	40
Handbag5	E	E1	50

[MK_QSL]

For Min Cost

Min(Cost,1)

Min(Cost,2)

Min(Cost,3)

For Souce

=FirstSortedValue(Source,Cost,1)

=FirstSortedValue(Source,Cost,2)

=FirstSortedValue(Source,Cost,3)

[MK_QSL]

If you found your answer, please close the thread by selecting correct/helpful answer, so that other users can use it..

[#4]

Product	Source	Destination	Cost	Cost 2	Total Cost
Handbag	A	A1	0	5	5
Handbag2	B	B1	10	10	20
Handbag3	C	C1	20	15	35
Handbag4	D	D1	30	10	40
Handbag5	E	E1	40	20	60

Right now, I'm using the above example where I'm using =FirstSortedValue(Source, [Total Cost],1)

Is there any way that if my data had 0 as one of the cost, not to include it as the cheapest source?

For example, the cheapest source would be B, C, and D.