Maybe you’re confused by the limit of how much of your AGI can be deducted?
In general, contributions to charitable organizations may be deducted up to 50 percent of adjusted gross income computed without regard to net operating loss carrybacks. Contributions to certain private foundations, veterans organizations, fraternal societies, and cemetery organizations are limited to 30 percent adjusted gross income (computed without regard to net operating loss carrybacks), however. Tax Exempt Organization Search uses deductibility status codes to indicate these limitations.