function CalculateSum(Atext, Btext, Ctext, form)
{
var A = parseFloat(Atext);
var B = parseFloat(Btext);
var C = parseFloat(Ctext);
form.Answer.value = 2.5*(A * B * C) + 45;
}


function ClearForm(form)
{
form.input_A.value = "";
form.input_B.value = "";
form.input_C.value = "";
form.Answer.value = "";
}