Calculating VAT & Gross amounts from a single echo $row[‘Net Amount’} from Mysqli Data – ONLY 2 decimal places

I have a php input form that I enter a ‘Net Price’ into mysql.

I have a seperate page that pulls that data into a table in a ‘Quotations’ page via ‘echo’.

I am trying to ‘automatically’ calculate VAT and Total amounts from the ‘Net Price’, which I can do via “$row[“Net_Price”]*0.2″ & “$row[“Net_Price”]*1.2″ but I cannot get it to display to only 2 decimal places (always shows 3).

Have tried adding javascript to the “” through research on here like the below:

echo"<td onchange='(function(el){el.value=parseFloat(el.value).toFixed(2);})(this)'>£ " . $row["Net_Price"]*0.2. "</td>";

Unsure if this is an impossible method, or if I should be attacking this differently, so help is appreciated.