SUM of column with same Title in CSR JS

Hello Anees !

I think that the value is not properly parsed to a number (parseFloat returns NaN for undefined or non-numeric values). You should use the isNaN(paidValue) ? 0 : paidValue to skip non-numeric or missing values safely.

Also reduce(..., 0) to make sure that your initial value is numeric.

var newValues = [];

ctx.ListData.Row.forEach(function(item) {
    var isDuplicate = newValues.filter(v => v.Title == item.Title);
    
    if (isDuplicate.length === 0) {
        var hasSameTitle = ctx.ListData.Row.filter(v => v.Title == item.Title);
        
        var itemsSum = hasSameTitle.reduce((total, current) => {
            var paidValue = parseFloat(current["Paid"]);
            return total + (isNaN(paidValue) ? 0 : paidValue);
        }, 0);
        
        item["Paid"] = itemsSum;
        newValues.push(item);
    }
});