I need a clearer understanding of how to solve: Calum runs a nightclub and decides to run a disco night to attract different customers. He is planning the event and is calculating how much he can spend on each item without spending more than he has budgeted. He only needs to buy 4 disco balls and 10 boxes of food. Each box of food costs $25. Calum’s budget for the disco balls and food is $330. How much, in dollars, can Calum afford to spend on each disco ball?