13 Which method is economically efficient if the wage rate is

(i) €5 an hour?

(ii) €50 an hour?

(iii) €500 an hour?

Four methods of completing a tax return are: a personal computer (PC), a pocket calculator, a pocket calculator with pencil and paper, a pencil and paper. With a PC, the job takes an hour; with a pocket calculator, it takes 12 hours; with a pocket calculator and pencil and paper, it takes 12 hours; and with a pencil and paper, it takes 16 hours. The PC and its software cost €1,000, the pocket calculator costs €10 and the pencil and paper cost €1.