Error at Cart/ Checkout Page

I keep getting the below error on the checkout page?

Warning: number_format() expects parameter 1 to be float, string given in?/home/customer/www/tiletrolly.designbymys.com/public_html/wp-content/plugins/woo-stripe-payment/includes/gateways/class-wc-payment-gateway-stripe-googlepay.php?on line?184