If the corporation claims itemized deductions in 2018, what is its income tax payable in the first quarter of 2018?

Crisame Corporation had the following quarterly data in 2018: Sales Cost of Sales Deductions Tax withheld by clients 10 7,000,000 3,000,000 2,500,000 350,000 20 11,000,000 5,000,000 3,500,000 550,000 30 11,000,000 4,800,000 4,500,000 550,000 40 15,000,000 6,500,000 1,500,000 750,000 The corporation also had excess tax credits from the prior year in the amount of PhP5,000