A domestic corporation had the ff. cumulative data as at the end of each of the first three quarters and end of a its fourth taxable year.

first second third year

gross profit from sales 500,000 700,000 850,000 990,000

operating expenses 200,000 280,000 340,000 396,000

income tax due (refundable or creditable) at the end of:

first quarter?

second quarter?

third quarter?

year?

A domestic corporation, in its fourth year of operations,had the ff. data on transactions in each of the quarters of a taxable year:

first second third fourth

gross profit from sales 500,000 350,000 800,000 900,000

dividend from a domestic corporation 20,000 20,000

interest on bank deposit 4,000 8,000 12,000

operating expenses 450,000 340,000 810,000 450,000

Income tax due(refundable or creditable) at the end of:

first quarter???

second quarter???

third quarter???

Year???