Single/Multiple step booking with calculation - HTML template

I am looking an html template for my travel website with booking form ( single / multiple steps) with calculation based on the number of people ( for each adult, child, senior), the tricky part is that my currency uses big numbers (Indonesian Rupiahs) which sometimes can be more than 10 digits.

Any idea where I can find such template on themeforest ? booking form script also will do.

Thank you