What’s fair for repairs on move out?

[Rocky Lalvani]

I have read some different responses on what to charge for when tenants leave.

I have 2 tenants leaving this month.  

For the one they were there a year and had some minor paint damage / holes. Cost of repair is $150. Is that fair to tenant or should I cover this?

For the 2nd they have been there 3 years. They had pets and the pets damaged the carpet. The steps also had carpet damage due to wear. 

I have a pet fee and deposit. Should the pet fee cover the carpet damage? It’s about $300 of repairs and the pet fee was $35 a month.  How much wear is acceptable for a carpet on steps?

There is also paint touch up and hole damage of about $600. Some of the posts suggested this as being normal wear and tear. How do you determine how to draw the line.

The washer and dryer have some weird discoloration and scratches on them. How do you determine what to charge? The repairs don’t make sense as they are mostly aesthetic.

Thanks!