Insurance

A phone insurance policy has a compulsory excess of $\displaystyle \pounds 150$.
A repair is quoted at $\displaystyle \pounds 420$.
Calculate the amount the insurer pays.

A policy has an excess of $\displaystyle \pounds 195$.
A repair is quoted at $\displaystyle \pounds 180$.
Determine whether it is worth making a claim. Use your working to justify your answer.

Policy A costs $\displaystyle \pounds 320$ a year with an excess of $\displaystyle \pounds 100$.
Policy B costs $\displaystyle \pounds 260$ a year with an excess of $\displaystyle \pounds 250$.
One claim is made during the year.
Determine which policy costs the customer less in total. Use your working to justify your answer.

An annual insurance premium is $\displaystyle \pounds 480$.
Paying monthly adds $\displaystyle 7.5\%$ to the total.
Calculate the total cost if paid monthly.