Paper 1 May/June 2008 Economics (9708/03) A Level

An entrepreneur takes out a $500 000 loan at a rate of interest of 10 %, and invests a further $500 000 of his own funds to set up a new firm.
In the first year he pays himself a salary of $40 000.
The rate of interest he could have obtained by investing his funds elsewhere is 8%, and the wage he could have earned in alternative employment is $30 000.
By how much will an economist’s calculation of the firm’s first year costs exceed an accountant's calculation?