let financeSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateFinance(){ financeSteps=””; const revenue=parseFloat(document.getElementById(“revenue”).value); const expenses=parseFloat(document.getElementById(“expenses”).value); const taxRate=parseFloat(document.getElementById(“taxRate”).value)/100; if(isNaN(revenue)||isNaN(expenses)||isNaN(taxRate)||revenue<=0){ alert("Please enter valid positive values for all fields."); return; } const netIncome = revenue – expenses – (revenue * taxRate); const profitMargin = (netIncome / revenue) * 100; document.getElementById("netIncome").value = formatCurrency(netIncome); document.getElementById("profitMargin").value = profitMargin.toFixed(2); financeSteps += `Inputs:
Revenue: ${formatCurrency(revenue)}
Expenses: ${formatCurrency(expenses)}
Tax Rate: ${(taxRate*100).toFixed(1)}%

`; financeSteps += `Formulas:
Net Income = Revenue – Expenses – (Revenue × Tax Rate)
Profit Margin = (Net Income ÷ Revenue) × 100

`; financeSteps += `Results:
Estimated Net Income: ${formatCurrency(netIncome)}
Profit Margin: ${profitMargin.toFixed(2)}%
`; if(document.getElementById(“calculationStepsFinance”).style.display===”block”){ document.getElementById(“calculationStepsFinance”).innerHTML = financeSteps; } } function resetFinance(){ document.querySelectorAll(“#calculator input”).forEach(el=>el.value=””); financeSteps=””; document.getElementById(“calculationStepsFinance”).innerHTML=”

Not calculated yet.

“; } function toggleFinanceSteps(){ const s=document.getElementById(“calculationStepsFinance”); const a=document.getElementById(“toggleArrowFinance”); if(s.style.display===”none”||s.style.display===””){ s.style.display=”block”;a.style.transform=”rotate(180deg)”; s.innerHTML=financeSteps||”

Not calculated yet.

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