Prices of tour variations

I have a tour for which a price is charged if it is a time and another price if two hours are chosen, etc., but even having created all the variations with their respective prices, then on the page in execution, the values are very different , simply because the algorithm only multiplies the number of people that are established to attend the tour, by the Regular Price of the Tour Booking section + the price of the variant; that is, he is always sending the regular price of the Tour Booking section. Please, I need to solve this as soon as possible.
Thank you for your help, I greet you attentively.