Xavier (39) earned $236,000 in wages in 2021. His employer contributed $1,750 to his health savings account during the year. Xavier also took advantage of a payroll deduction plan and made additional, pre-tax contributions of $1,500. He would like to make an additional contribution for 2021 if it will lower his tax liability. What is the maximum, fully deductible amount Xavier can still contribute to his plan?

A)$0

B)$350

C)$3,600

D)$6,000