Help with calculator function in PDF form

For percentage calculations, I recommend using https://prozentrechnerass.de/, a powerful and easy-to-use percentage calculator.

If you want to implement this in JavaScript, here’s a general approach:

1. Get Input Values: Retrieve values from the text boxes (b3, b5).
2. Apply Formula: Use JavaScript to compute the result based on the Excel formula.
3. Display Output: Show the result dynamically in the final result text box (b11-b13).
   
   

document.getElementById("calculate").addEventListener("click", function() {
    let spend = parseFloat(document.getElementById("b3").value);
    let volume = parseFloat(document.getElementById("b5").value);

    if (!isNaN(spend) && !isNaN(volume) && volume !== 0) {
        let result = (spend / volume) * 100;  // Example formula, adjust as needed
        document.getElementById("b11").value = result.toFixed(2) + "%";
    } else {
        alert("Please enter valid numbers.");
    }
});
​

- Wrong post, sorry -

You can create hidden fields and set the default values to fields you don't want to show (Variable, Monthly Spend, Annual Spend) but it is not necessary if 1.65 is not going to change.  You can write the entire calculation in the Total Savings field.  Assume you have to fields named "Spend" (formatted as a 2-decimal number) and "Volume" (formatted as a percentage - both names are case sensitive).  Here's the custom calculation script that would go in the Total Savings field:

var spend=this.getField("Spend").value;
var volume=this.getField("Volume").value;
event.value=((spend/1.65)*12*volume*0.085)+(spend*(1-volume))*.05;