Summarized by Month Bar Chart

You do this by unpivoting the source data.  Ideally you would also provide something better than "Jan"  - for example "202201" 

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcnR01DVU0lEyNDAAkgpI2MgAwYjVgag0AnJNwSoh6o3ApCmIMEYyAKTcyckJZrABiqkIxRCTTIBkbCwA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"PO No" = _t, #"PO Value" = _t, #"Jan Ach" = _t, #"Jan Tar" = _t, #"Feb Ach" = _t, #"Feb Tar" = _t, #"Mar Ach" = _t, #"Mar Tar" = _t]),
    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(Source, {"PO No", "PO Value"}, "Attribute", "Value")
in
    #"Unpivoted Other Columns"

And while you're at it you would probably also want to normalize your data to keep the PO details separate from the target/achieved facts, and then you will want to add a Calendar table to your data model.

You can achieve the cumulative value by using Quick Measures.