feat: Credit note.

src/containers/Sales/CreditNotes/CreditNoteForm/CreditNoteFormHeader.js

@@ -0,0 +1,42 @@
+import React from 'react';
+import { useFormikContext } from 'formik';
+import intl from 'react-intl-universal';
+import classNames from 'classnames';
+import { CLASSES } from 'common/classes';
+import CreditNoteFormHeaderFields from './CreditNoteFormHeaderFields';
+
+import { getEntriesTotal } from 'containers/Entries/utils';
+import { PageFormBigNumber } from 'components';
+
+import withCurrentOrganization from 'containers/Organization/withCurrentOrganization';
+
+import { compose } from 'utils';
+
+/**
+ * Credit note header.
+ */
+function CreditNoteFormHeader({
+  // #withCurrentOrganization
+  organization: { base_currency },
+}) {
+  const { values } = useFormikContext();
+
+  // Calculate the total amount.
+  const totalAmount = React.useMemo(
+    () => getEntriesTotal(values.entries),
+    [values.entries],
+  );
+
+  return (
+    <div className={classNames(CLASSES.PAGE_FORM_HEADER)}>
+      <CreditNoteFormHeaderFields />
+      <PageFormBigNumber
+        label={intl.get('due_amount')}
+        amount={totalAmount}
+        currencyCode={base_currency}
+      />
+    </div>
+  );
+}
+
+export default compose(withCurrentOrganization())(CreditNoteFormHeader);