Quote/Price widget/script calculated from inputs on a form

I need help to develop a script/widget that will produce a quote/price based on the response to the questions on this form https://docs.google.com/forms/d/1Z2e...it?usp=sharing

Base rate - 4.00%

Discounts on base rate for the following fields:

Type of cover - If option selected is Comprehensive minus 0% from base rate

If option selected is Third Party Fire & Theft minus 20% from base rate

If option selected is Third Party only minus 70% from base rate

Tracking device - If option selected is Yes minus 15% from base rate

If option selectd is No minus 0% from base rate

Loadings on base for the following fields:

Vehicle value - If the vehicle value inserted > R150 000 add 0% to base rate

If the vehicle value inserted < R150 000 add 50% to base rate

Vehicle use - If the option selected is Private... add 0% to base rate

If the option selected is Professional.. add 5% to base rate

If the option selected is Business... add 15% to base rate

Date of birth - If age is < 25 years add 30% to base rate

If age is > 25 years add 0% to base rate

Date license first obtained - if date is > 2 years from current date add 0% to base rate

If date is < 2 years from current date add 30% to base rate

Claims in last 3 years - if response is no claims add 0% to base rate

if response is 1 to 2 claims add 5% to base rate

if response is 2+ claims add 15% to base rate

The total price must then be calculated by the cumulative sum of the above rating criteria expressed as a rate percent and applied to the Vehicle value

Finally the following must be added in:

Car Hire Cover - If response is yes add R60.00

If response is No add NIL

I hope someone out there can assist.

Thanks & regards, Melvin