let ba2plusSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateBA2Plus(){ ba2plusSteps=””; const principal = parseFloat(document.getElementById(“principalAmount”).value); const interest = parseFloat(document.getElementById(“interestRate”).value) / 100; const term = parseFloat(document.getElementById(“loanTerm”).value); const frequency = document.getElementById(“paymentFrequency”).value; if (isNaN(principal) || isNaN(interest) || isNaN(term) || principal <= 0 || interest <= 0 || term <= 0) { alert("Please enter valid positive values for all fields."); return; } const months = frequency === "monthly" ? term * 12 : frequency === "quarterly" ? term * 4 : term; const monthlyInterest = interest / 12; const payment = principal * (monthlyInterest / (1 – Math.pow(1 + monthlyInterest, -months))); document.getElementById("paymentResult").value = formatCurrency(payment); ba2plusSteps += `Inputs:
Principal: ${formatCurrency(principal)}
Interest Rate: ${(interest * 100).toFixed(1)}%
Loan Term: ${term} years
Payment Frequency: ${frequency}

`; ba2plusSteps += `Formula:
Payment = Principal × (Monthly Interest Rate) / (1 – (1 + Monthly Interest Rate) ^ -Number of Payments)

`; ba2plusSteps += `Results:
Monthly Payment: ${formatCurrency(payment)}
`; ba2plusSteps += `Tip: Adjusting the loan term or interest rate can significantly affect your monthly payments.`; if (document.getElementById(“calculationStepsBA2Plus”).style.display === “block”) { document.getElementById(“calculationStepsBA2Plus”).innerHTML = ba2plusSteps; } } function resetBA2Plus(){ document.querySelectorAll(“#ba2plus_calculator input, #ba2plus_calculator select”).forEach(el => el.value = “”); ba2plusSteps = “”; document.getElementById(“calculationStepsBA2Plus”).innerHTML = “

Not calculated yet.

“; } function toggleBA2PlusSteps(){ const s = document.getElementById(“calculationStepsBA2Plus”); const a = document.getElementById(“toggleArrowBA2Plus”); if (s.style.display === “none” || s.style.display === “”) { s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = ba2plusSteps || “

Not calculated yet.

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