How much will it cost to fix a number plate and Minor mark on a car ?

I backed into the front of someone elses car but only damaged the number plate and left a minor mark on their car or:I backed into the front of someon

I backed into the front of someone else's car but only damaged the number plate and left a minor mark on their car

or:I backed into the front of someone else's car but only damaged the number plate and left a minor mark on their car

Tags:plate,