An employee starts work on 1 January 2000 on an annual salary of $30,000. His pay scale will give him an increase of $800 per annum on the 1 January until 1 January 2015 inclusive. He remains on his salary until he retires on 31 December 2040. How much will he earn during his working life ?

Full procedure would be really appreciated

Please help me with this problem (Crying)