Completion requirements
Assume you can lease an item you need for a project for $800/day. To purchase the item, the cost is $12,000 plus a daily operational cost of $400/day. But if you lease the item for more than 29 days you will get the item $500/day for rest of the days. Example; if you lease it in 30th day you need to pay 29*$800+$500=$23700. Now calculate How long will it take for the purchase cost to be the same as the lease cost?