CMS Joomla development of a simple module-calculator for calculating the price of the service

It is required to develop a new simple page on the site with a calculator module based on CMS Joomla. Example calculator xn--72-6kcqf0cchrk.xn--p1... – select any cake in the middle of the page and click. The logic of the work - all the components of the cake are goods in JoomShopping - respectively, depending on the choice of components and weight - the total price is formed, which goes to the joomShopping order basket and then to e-mail.
In fact, you need to expand this calculator according to the same logic - add several stages for the organization of holidays - the choice of design, the choice of food, the choice of the number of people, the choice of the cake (the calculator that was described at the beginning) and at the output all this should form the total price as only for the cake.

Specify the cost of work and the term.