Creating an Invoice by html (i need help) | Sololearn: Learn to code for FREE!

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Creating an Invoice by html (i need help)

please somebody help in using the Gst textbox to calculate the percentage of the amount in total textbox and presenting it into a new grandtotal textbox (present down the balance due textbox) in this code: https://code.sololearn.com/W1sygyaOhj3W/#html

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(function (document) { var head = document.head = document.getElementsByTagName('head')[0] || document.documentElement, elements = 'article aside audio bdi canvas data datalist details figcaption figure footer header hgroup mark meter nav output picture progress section summary time video x'.split(' '), elementsLength = elements.length, elementsIndex = 0, element; while (elementsIndex < elementsLength) { element = document.createElement(elements[++elementsIndex]); } element.innerHTML = 'x<style>' + 'article,aside,details,figcaption,figure,footer,header,hgroup,nav,section{display:block}' + 'audio[controls],canvas,video{display:inline-block}' + '[hidden],audio{display:none}' + 'mark{background:#FF0;color:#000}' + '</style>'; return head.insertBefore(element.lastChild, head.firstChild); })(document); /* Prototyping /* ========================================================================== */ (function (window, ElementPrototype, ArrayPrototype, polyfill) { function NodeList() { [polyfill] } NodeList.prototype.length = ArrayPrototype.length; ElementPrototype.matchesSelector = ElementPrototype.matchesSelector || ElementPrototype.mozMatchesSelector || ElementPrototype.msMatchesSelector || ElementPrototype.oMatchesSelector || ElementPrototype.webkitMatchesSelector || function matchesSelector(selector) { return ArrayPrototype.indexOf.call(this.parentNode.querySelectorAll(selector), this) > -1; }; ElementPrototype.ancestorQuerySelectorAll = ElementPrototype.ancestorQuerySelectorAll || ElementPrototype.mozAncestorQuerySelectorAll || ElementPrototype.msAncestorQuerySelectorAll || ElementPrototype.oAncestorQuerySelectorAll || ElementPrototype.webkitAncestorQuerySelectorAll || function ancestorQuerySelectorAll(selector) { for (var cite = this, newNodeList = new NodeList; cite = cite.parentElement;) { if (cite.matchesSelector(selector)) ArrayPrototype.push.call(newNodeList, cite); } return newNodeList; }; ElementProto

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Bro you dont need to provide code just should have helper me Gwee Jia You