Tax not calculating in IE & Chrome

Hi there – My woocommerce shop is calculating tax properly in Firefox, but not in Internet Explorer & Chrome. The URL is https://www.whiteones.ca/shop/ and the system report is: Thank you for advice!

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### WordPress Environment ###

Home URL: https://www.whiteones.ca
Site URL: https://www.whiteones.ca
WC Version: 2.6.13
Log Directory Writable: ?
WP Version: 4.7.2
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ?
Language: en_CA

### Server Environment ###

Server Info: Apache
PHP Version: 5.6.30
PHP Post Max Size: 64 MB
PHP Time Limit: 30
PHP Max Input Vars: 1000
cURL Version: 7.29.0
NSS/3.21.3 Basic ECC

SUHOSIN Installed: –
MySQL Version: 5.6.33
Max Upload Size: 64 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 2.6.13
: 
woocommerce_sessions: ?
woocommerce_api_keys: ?
woocommerce_attribute_taxonomies: ?
woocommerce_downloadable_product_permissions: ?
woocommerce_order_items: ?
woocommerce_order_itemmeta: ?
woocommerce_tax_rates: ?
woocommerce_tax_rate_locations: ?
woocommerce_shipping_zones: ?
woocommerce_shipping_zone_locations: ?
woocommerce_shipping_zone_methods: ?
woocommerce_payment_tokens: ?
woocommerce_payment_tokenmeta: ?
MaxMind GeoIP Database: ?

### Active Plugins (8) ###

Divi Switch: by Gritty – 1.1
Divi Children: by Luis Alejandre – 2.0.8
Akismet: by Automattic – 3.2
BackupBuddy: by iThemes – 7.2.2.0
Divi Booster: by Dan Mossop – 2.4.0
Jetpack by WordPress.com: by Automattic – 4.5
WooCommerce PayPal Express Checkout Gateway: by Automattic – 1.1.2
WooCommerce: by WooThemes – 2.6.13

### Settings ###

Force SSL: ?
Currency: CAD ($)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2

### API ###

API Enabled: ?

### WC Pages ###

Shop Base: #788 - /shop/
Cart: #47 - /basket-green-clean/
Checkout: #48 - /checkout-affordable/
My Account: #49 - /my-account-chemical-free-cleaning/

### Taxonomies ###

Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

### Theme ###

Name: WHITE ONES
Version: 1.0
Author URL: https://www.collingwoodwebdesign.com/
Child Theme: ?
Parent Theme Name: Divi
Parent Theme Version: 3.0.30
Parent Theme Author URL: https://www.elegantthemes.com
WooCommerce Support: ?

### Templates ###

Overrides: –