Question 223548
You decide to market your own custom computer software. You invest $3255 for computer hardware and spend $2.90 to buy and package each disk. If each program sells for $13.75, how many copies must you sell to break even.


Let the amount of programs or disks I need to sell be D


Then the amount I'd have to spend to buy and package D disks is: 2.9D


The proceeds from selling D disks = 13.75D


In order to break even, we have: 13.75D = 2.9D + 3,255


13.75D - 2.9D = 3,255


10.85D  =  3,255


D = {{{3255/10.85}}} = 300


Therefore, in order to break even, I will have to sell D, or {{{highlight_green(300)}}} disks, or programs.