Line chart from months in columns

Hi, 

Quite new to power bi, trying to do a simple line chart from the sample data above (for one item at a time such as a chart for depreciation) with months in the x axis. can do all sorts of visualisations but not line chart. apparently data is not organised (i.e. months are in columns and line chart doesn't support by default). Any work around? would really appreciate - have spent a few hours researching already - no luck yet.

Thanks