How To Dispute Repair Costs Taken Out Of Security Deposit (az)

Hello,

Landlord provided an itemized deduction for the single repair we agreed to on the move out inspection: the replacement of a shower head. We received the itemization for the repair totaling (along with an estimate from a handyman) as below:

Shower Hardware Kit: $250 Materials: $80 Labor: $125 Total: $455

This seems unreasonable to me. The move out inspection clearly states a “broken shower head” and that being the only thing needing repair, which should reasonably only cost $100 to $150 MAX. I feel as if the handyman is packing more costs into these line items.

The total deposit was $2,499.

How do I proceed with disputing the repair costs? Do I need to call a handyman and get another quote to support that the amount charged is unreasonable? Does he even need a handyman to fix this, or would a reasonable repair charge be for the shower head, given it is a simple repair and replacement.

For more background, the hard water calcified the rubber parts of the shower head and then those rubber pieces broke off. Can he even charge for this at all, given it is a fixture and water issues are not a tenant responsibility?