65652 Math on my site

I need to do simple mathematical equations on my site I want to have a sales rep be able to go to my site and enter his projected cold calls and closing rate and calculate how much he'll make daily, weekly, monthly and annually. FOR EXAMPLE: If he's selling a product that's $100 and he makes 100 cold calls with a closing rate of 10%, he'll make $1,000 per day (10 sales X $100 per sale = $1,000) So, if he works 5 days in a week, he'll make $5,000 ($1,000 X 5 days = $5,000), if he works 4 weeks in a month, he'll make $20,000...and so on.