Bien no se que esta andando mal, o si todo anda mal que se yo. una manito? aqui les dejo el código.
Código:
  
function total(){
        var PAG1 = document.getElementById("radiop1").value;
        var PAG2 = document.getElementById("radiop2").value;
        var PAG3 = document.getElementById("radiop3").value;
        var DIA1 = document.getElementById("radiod1").value;
        var DIA2 = document.getElementById("radiod2").value;
        var TOTAL1 = document.getElementById("total1").value;
        //alert("anda la funcion 2");
            if(PAG1==checked  && DIA1==checked){
            TOTAL1 = 249; 
            }
            else if(PAG2==checked  && DIA1==checked){
            TOTAL1 = 398;
            }
            else if(PAG3==checked  && DIA2==checked){
            TOTAL1 = 513;
            }
        }
Código HTML:
 <input id="radiop1" type="radio" name="nroPag" value="1" class="radio" onclick=" total()"/> <input id="radiop2" type="radio" name="nroPag" value="2" class="radio" onclick=" total()"/> <input id="radiop3" type="radio" name="nroPag" value="3" class="radio" onclick=" total()"/> <input id="radiod1" type="radio" name="nroDia" value="1" class="radio" onclick=" total()"/> <input id="radiod2" type="radio" name="nroDia" value="2" class="radio" onclick=" total()"/> <p name="subtotalResumen">TOTAL: <input name="total1" id="total1" type="text" value="100"/></p>
 
 
 ) es decir, lo que tengo es:


