let mortgageSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateMortgage(){ mortgageSteps=””; const income = parseFloat(document.getElementById(“income”).value); const debt = parseFloat(document.getElementById(“monthlyDebt”).value); const creditScore = parseFloat(document.getElementById(“creditScore”).value); const downPayment = parseFloat(document.getElementById(“downPayment”).value); const loanTerm = parseFloat(document.getElementById(“loanTerm”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value); if(isNaN(income) || isNaN(debt) || isNaN(creditScore) || isNaN(downPayment) || isNaN(loanTerm) || isNaN(interestRate) || income <= 0){ alert("Please enter valid positive values for all fields."); return; } const loanAmount = income * 0.28 – debt – downPayment; document.getElementById("mortgageResult").value = formatCurrency(loanAmount); mortgageSteps += `Inputs:
Income: ${formatCurrency(income)}
Monthly Debt: ${formatCurrency(debt)}
Credit Score: ${creditScore}
Down Payment: ${formatCurrency(downPayment)}
Loan Term: ${loanTerm} years
Interest Rate: ${interestRate}%

`; mortgageSteps += `Formulas:
Loan Amount = Income × 0.28 – Monthly Debt – Down Payment

`; mortgageSteps += `Results:
Estimated Loan Amount: ${formatCurrency(loanAmount)}
`; if(document.getElementById(“calculationStepsMortgage”).style.display === “block”){ document.getElementById(“calculationStepsMortgage”).innerHTML = mortgageSteps; } } function resetMortgage(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); mortgageSteps = “”; document.getElementById(“calculationStepsMortgage”).innerHTML = “

Not calculated yet.

“; } function toggleMortgageSteps(){ const s = document.getElementById(“calculationStepsMortgage”); const a = document.getElementById(“toggleArrowMortgage”); if(s.style.display === “none” || s.style.display === “”){ s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = mortgageSteps || “

Not calculated yet.

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