Provide EV Cost calculators info

**As a [description of user]?**
Member of the general public in BC who is curious about (or considering) an electric vehicle

**I want to [functionality]**
put some information into fields to get accurate information calculated about expenses of EVs

**So that [benefit]**
I don't have to go do a bunch of research on a bunch of sites and do many complicated calculations on my own.

**Additional context**
Add any other context, attachments or screenshots

**Acceptance Criteria**
- Cost calculators (pay-back period, total costs calculator over 5 years)