Re Charitable Deductions (as copied from this site:
http://www.gofso.com/Premium/LE/15_le_cg/fg/fg-Charity_Tax.html)
"... If you go to a charity affair or buy something to benefit a charity (e.g., a magazine subscription or show tickets), you cannot deduct the full amount you pay. Only the part above the fair market value of the item you purchase is fully deductible. For example, if you pay $500 for a charity luncheon worth $200, only $300 can be deducted. An exception allows you to deduct the full amount if what you get in return is insubstantial in value (e.g., 2% of the value of your contribution) and the charity tells you the deductible amount...."
In summary, you might want to check before deducting full tkt amount.