v1.1.0: updated calculator and more details on how it works

What's Changed

• First changes by @vania-pooh in #4
• Updated pricing section by @vania-pooh in #11
• Swapped price and number of test odometers by @vania-pooh in #12
• Price coefficients by @vania-pooh in #14

Full Changelog: 1.0.2...1.1.0