Compute Lenny's estimated tax payment for the third quarter. He is self-employed and he expects to earn $44,800.00 this year. His estimated income tax rate is 18%. (For self-employed persons, Social...

Compute Lenny's estimated tax payment for the third quarter. He is self-employed and he expects to earn $44,800.00 this year. His estimated income tax rate is 18%. (For self-employed persons, Social Security tax is 12.4% of wages up to $128,400, and Medicare tax is 2.9% of all wages.)