Consumption tax paid = [20+1000/(1.17 *10000)] * 30%+2.5 = 8.5252.

Second question: consumption tax = 600 * 250+[1* 35000 * (1+10%)/(1-20%)] * 20%+1*.

Consumption tax = (100+40+10+4) * 240 = 36960.

Fourth consumption tax = {[(60000+35000+80000+55000)/(1-30%)]+120000/1.17} * 30%.