April 1 (SeeNews) - Bulgaria's energy regulator said on Friday that it approved a jump in the wholesale price of natural gas for April to 142.59 levs ($80.45/72.90 euro) per MWh, from 113.73 levs per MWh in March but still significantly less than the 179.36 levs per MWh, which public supplier Bulgargaz had sought about a fortnight ago.