Integration problem with language

Hello, I am using the plugin “Advanced Real Estate Mortgage Calculator” in Spanish language and the translated works fine but the Monthly Payment field shows the figures in a version prepared for Dollars and not Euros.

My question is: ¿I could change the comma by point?

If you want to see this problem on the web I’m working can visit the following link http://www.joaquingestionesinmobiliarias.com

Thank you very much and best regards!

http://ww.wp.xz.cn/extend/plugins/advanced-real-estate-mortgage-calculator/