Texas Rotisserie Chicken Ltd. sells pre-packed food. The company needs to know how many packs of Caesar salad to have at hand each day. Each pack costs £ 2.40 and is sold to customers for £ 3.10. Unsold packs of Caesar salad are worthless at the end of the day with the exception of those packs that are stored in a shop fridge and collected by a supplier every evening. The capacity of the fridge is 80 packages. The following demands were found after studying the last three months\' sales: 

100 packs – 10 % of the time 

150 packs – 10 % of the time 

200 packs – 15 % of the time 

250 packs – 40% of the time 

300 packs – 25% of the time 

Every morning Texas Rotisserie Chicken orders Caesar salad from a supplier that offers only a shipment containing 50 packs (for example, 150 packs consist of 3 shipments). Delivery costs of one shipment are £ 15, processing costs of each order are £ 4. 

Required:

Calculate the number of packs of Caesar salad that would maximize Texas Rotisserie Chicken\'s daily profit.