Based on the information provided, Trey's gross monthly income is $1,125 ($13,500 / 12).
Trey's monthly federal income tax is $130.50 ($1,125 x 11.6%).
Trey's monthly Social Security (FICA) tax is $69.75 ($1,125 x 6.2%).
Trey's monthly Medicare tax is $16.31 ($1,125 x 1.45%).
Trey's monthly state tax is $45 ($1,125 x 4%).
Trey's monthly local tax is $1.13 ($1,125 x 0.1%).
The total monthly deductions are $262.69 ($130.50 + $69.75 + $16.31 + $45 + $1.13).
Trey's net monthly income after deductions is $862.31 ($1,125 - $262.69).