Rain Corp. had operating income of 300,000 after deducting 12,000 for charitable contributions made during the current fiscal year, but not including dividends of 10,000 received from 10% owned domestic taxable corporation. How much is the base amount to which the percentage limitation should be applied in computing the maximum deduction for the charitable contribution?

a. 312,000

b. 300,000

c. 322,000

d. 315,000