Чашка "Вiдчуй, щоб зрозумiти"

<script> (function($) { $('.count-holder:not(.count-holder_procceed)').each(function() { var $wrapper = $(this); $wrapper.addClass('count-holder_procceed'); var $count = $wrapper.find('.count-input'); var $amount = $wrapper.find('.amount-input'); var rate = 249; $count.on('keyup', function() { var count = parseInt($(this).val(), 10) || 0; $amount.val(rate * count); }); }); })(jQuery); <⁄script>