saas-platform/frontend/saas-web/overrides/exporter/Stylesheet.js

Ext.define('saas.override.exporter.Stylesheet', {
    override: 'Ext.exporter.file.ooxml.excel.Stylesheet',

    numberPatterns: {
        'General Number': 1,
        'Fixed': 2,
        'Standard': 2,
        'Percent': 10,
        'Scientific': 11,
        'Currency': '"$"#,##0.00',
        'Euro Currency': '"€"#,##0.00',
        'Total':'#,##0.00'
    }

});