In the current year, William made the following contributions:

Value of his church volunteer work $$1,000$

Cash to a political candidate $400$

Out$-$of$-$pocket expenses to do charity work $300$

Cash to the city$$s volunteer fire department $200$

What is William$$s maximum allowable contribution deduction in the current year, before any AGI limitations$?$

Group of answer choices

$$500$

$$900$

$$200$

$$1,500$

$$1,900$

$$300$

please explain how to solve