Finding "last price" paid for multiple receipts in a large set of data

[Rim2Rim]

I am trying to identify a formula that allows me to quickly identifiy the "last price" paid for a part number over several different receipt transactions. I've tried unsuccessfully with other posts that I have found on the web. An example of the data is below, also notice it is possible to have data with different prices for the same part (refer to p/n 00093953) on the same transaction date to complicate matters (in this instance I would prefer to return higher of the 2 values as the tiebreaker or alternatively but less desirable the value associated with the higher/newer PO # as a tiebreaker if that is an option). Alternatively, maybe there is a Pivot Table logic I can apply even though I am in the wrong forum. Sample data attached as well as shown below:

Period Month Legacy P/N PO# PO Line UOM Transaction Date Cost/ UOM ($USD)
1 Oct 00186226 1944 9 EA 10/18/2013 500
1 Oct 00186226 1947 1 EA 10/23/2013 200
1 Oct 00186226 1959 3 EA 10/25/2013 1,000
4 JAN 00186226 1959 6 EA 1/10/2014 750
1 Oct 00093953 1378 5 EA 10/7/2013 2
1 Oct 00093953 1381 8 EA 10/7/2013 3
1 Oct 00102294 3066 5 NM 10/1/2013 6,000
1 Oct 00102294 3066 5 NM 10/15/2013 5,500
1 Oct 00102294 3054 5 NM 10/23/2013 5,000