Cameron Electronics makes and sells power banks for phones. Each power bank has a selling price of $90. The following cost data per power bank which is based on a capacity of 4,000 units per period. Direct Material $25 Direct Labor $20 Manufacturing Overhead (70% variable; 30% fixed) $10 Cameron receives a special order for 100 more power banks. The only additional cost Cameron will incur is $4 shipping charges per item. Cameron has sufficient idle capacity to produce additional units. 

What is the minimum price Cameron should charge per power bank for the special order?