sales

$('.add').on('click',function(){
    
    var main_std = $('.std').val();
    var main_min = $('.min').val();
    var main_max = $('.max').val();
    
    <input type="hidden" class="selling_std" name="selling_std[]" value="'+main_std+'"> \
    <input type="hidden" class="selling_min" name="selling_min[]" value="'+main_min+'"> \
    <input type="hidden" class="selling_max" name="selling_max[]" value="'+main_max+'"> \
    
    
    pricing level on change
    
    $(this).closest('tr').find('.selling_std').val("0.00");
        $(this).closest('tr').find('.selling_max').val("0.00");
        $(this).closest('tr').find('.selling_min').val("0.00"); 
        
        
        $(that).closest('tr').find('.selling_std').val(stdprice2_cat);
                                $(that).closest('tr').find('.selling_max').val(maxprice2_cat);
                                $(that).closest('tr').find('.selling_min').val(minprice2_cat);