//t the user for the required inputs
var costOfProbe = parseFloat(prompt("Enter the cost of the probe:"));
var costSavingsPerHour = parseFloat(prompt("Enter the cost savings per hour:"));
var hoursSavedPerWeek = parseFloat(prompt("Enter the number of hours saved per week:"));
var weeksPerYear = parseFloat(prompt("Enter the number of weeks the machine is in use per year:"));
// Calculate the ROI
var annualCostSavings = costSavingsPerHour * hoursSavedPerWeek * weeksPerYear;
var roi = (annualCostSavings / costOfProbe) * 100;
// Display the results
document.write("By using a probe, you can save $" + annualCostSavings + " per year.");
document.write("Your ROI for purchasing the probe is " + roi + "%.");
