let shippingSteps = “”; function calculateShippingCost(){ shippingSteps = “”; const weight = parseFloat(document.getElementById(“itemWeight”).value); const dimensions = document.getElementById(“itemDimensions”).value.split(‘x’).map(Number); const shippingMethod = document.getElementById(“shippingMethod”).value; if(isNaN(weight) || dimensions.length !== 3 || dimensions.some(isNaN) || weight <= 0){ alert("Please enter valid values for all fields."); return; } const volume = dimensions[0] * dimensions[1] * dimensions[2]; const costPerKg = shippingMethod === "air" ? 10 : 5; // Example cost rates const costPerCbm = shippingMethod === "air" ? 50 : 20; // Example cost rates const shippingCost = (weight * costPerKg) + (volume / 1000000 * costPerCbm); document.getElementById("shippingCost").value = formatCurrency(shippingCost); shippingSteps += `Inputs:
Weight: ${weight} kg
Dimensions: ${dimensions.join(‘ x ‘)} cm
Shipping Method: ${shippingMethod}

`; shippingSteps += `Formulas:
Shipping Cost = (Weight × Cost per kg) + (Volume × Cost per cbm)

`; shippingSteps += `Results:
Estimated Shipping Cost: ${formatCurrency(shippingCost)}
`; if(document.getElementById(“calculationStepsShipping”).style.display === “block”){ document.getElementById(“calculationStepsShipping”).innerHTML = shippingSteps; } } function resetShippingForm(){ document.querySelectorAll(“#shipping_calculator_form input, #shipping_calculator_form select”).forEach(el => el.value = “”); shippingSteps = “”; document.getElementById(“calculationStepsShipping”).innerHTML = “

Not calculated yet.

“; } function toggleShippingSteps(){ const s = document.getElementById(“calculationStepsShipping”); const a = document.getElementById(“toggleArrowShipping”); if(s.style.display === “none” || s.style.display === “”){ s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = shippingSteps || “

Not calculated yet.

“; } else { s.style.display = “none”; a.style.transform = “rotate(0deg)”; } } function formatCurrency(n) { return “£” + n.toFixed(2); }