Context:

"On Bookinbug I have form questions that allow customers to select a drop down menu with a separate cost attached to their selection. This automatically increases the base cost. I have used this form a number of times for options such as number of children attending. The cost increases as number of children increases.

I have form questions that allow customers to select a drop down menu with a separate cost attached to their selection. This automatically increases the base cost. I have used this form a number of times for options such as number of children attending. The cost increases as number of children increases. I also use it for distance to travel from city (up to 15 mile £0, up to 20 miles £10 extra, up to 25 miles £15 extra etc)"