Payment Gateway Error, Please Help!

I’m using the Responsive Directory Theme and the Business Directory Theme as Child theme. I integrated and configured the payment gateway with the plugin: “Paystack gateway for premiumpress themes” downloaded from https://github.com/PaystackHQ/wordpress-premiumpress-paystack-gateway. I have been having problem since I configured it with the amount figure showing 2 figure digits instead of 5 digits. I have checked my WP settings to see if I set something to that effect, but can’t find anything. I’ve contacted the Paystack people and they have not been able to help either. Please can anyone help solve this problem for me.
Thanking you in advance. see attached pictures please.