Z Limited is a Canadian-controlled private corporation. In the current year, Z Limited had net income for tax purposes of $100,000. Z Limited made the following charitable contributions during the current year and has charitable donation receipts to support these amounts.

• Donation of Canadian public Securities with a cost of $10,000 and a fair market value of $16,000 to the United Way.
• Cash donation of $3,000 to Canadian Cancer Society.
• Donation of used computer equipment to a childrens registered charity, the equipment had a UCC of $5,000 and a fair market value of $1,000.

Z Limited has unused charitable donations from two years ago of $4,000. The net income for tax purposes of $100,000 has already been adjusted for the donations that were deducted in computing accounting net income.

What is the maximum deduction available to Z limited in computing its taxable income for the current year, in respect of the above donations?

A. $ 18,000

B. $ 20,000

C.$ 23,000

D.$ 24,000