[Nexus]

https://jsfiddle.net/ayufwL17/

var engine=document.getElementById('proso_engine'),
	table=document.getElementById('proso_table');
	
[engine,table].forEach(function(item){
	item.addEventListener('change',function(){
		var total=1000;
		
		total+=+table.options[table.selectedIndex].getAttribute('price-table');
		total+=+engine.options[engine.selectedIndex].getAttribute('price-engine');
		
		document.getElementById('result_02').innerHTML=total;
	},false);
});