let calculationSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateTotal(){ calculationSteps=””; const price = parseFloat(document.getElementById(“itemPrice”).value); const quantity = parseInt(document.getElementById(“quantity”).value); const discount = parseFloat(document.getElementById(“discount”).value) / 100; const shipping = parseFloat(document.getElementById(“shipping”).value); if(isNaN(price) || isNaN(quantity) || isNaN(discount) || isNaN(shipping) || price <= 0 || quantity <= 0){ alert("Please enter valid positive values for all fields."); return; } const subtotal = price * quantity; const discountAmount = subtotal * discount; const total = subtotal – discountAmount + shipping; document.getElementById("totalCost").value = formatCurrency(total); calculationSteps += `Inputs:
Item Price: ${formatCurrency(price)}
Quantity: ${quantity}
Discount: ${(discount * 100).toFixed(1)}%
Shipping: ${formatCurrency(shipping)}

`; calculationSteps += `Formulas:
Total Cost = (Item Price × Quantity) – Discount + Shipping

`; calculationSteps += `Results:
Total Cost: ${formatCurrency(total)}
`; calculationSteps += `Tip: Don’t forget to check for additional discounts and coupons that could further reduce your total cost.`; if(document.getElementById(“calculationSteps”).style.display === “block”){ document.getElementById(“calculationSteps”).innerHTML = calculationSteps; } } function resetCalculator(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); calculationSteps = “”; document.getElementById(“calculationSteps”).innerHTML = “

Not calculated yet.

“; } function toggleCalculationSteps(){ const steps = document.getElementById(“calculationSteps”); const arrow = document.getElementById(“toggleArrow”); if(steps.style.display === “none” || steps.style.display === “”){ steps.style.display = “block”; arrow.style.transform = “rotate(180deg)”; steps.innerHTML = calculationSteps || “

Not calculated yet.

“; } else { steps.style.display = “none”; arrow.style.transform = “rotate(0deg)”; } } function formatCurrency(n) { return currencySymbol + n.toFixed(2) + ” ” + fixedCurrency; }