How can I view changes in a table that changes monthly?

Hi,

Can anyone please help me with the formula to view up / down value changes in a monthly published table, where the items in the first column may change (for example a column of products), and in the corresponding columns, are a list of values (for example, price)?

I have attached an example spreadsheet with the changing 'products' highlighted in red, and where the values may change on a monthly basis.

The idea is that each month, it is easy to see what values have either decreased or increased from the month before hand at a glance.

Many Thanks!