Automate price change on EFO system for Tuesdays.

We are a pizza store that uses software to place customer orders. Every Tuesday some pizzas are on discount ($7.95). We want the discount to automatically apply to those set pizzas on Tuesday. However the discount shouldn't apply when the delivery button ("Dlv") is selected. We also want the order screen cleared at 1am everyday. So basically hit the "Clear" button and the when prompted hit the "Yes" button at 1am everyday. The programmer who created the software is no longer available. A possible solution might be to check if a certain product code appears on the screen and as long as it is Tuesday and not a Delivery then change the price to $7.95. For example, it's Tuesday and the pizza with the product code AAA was entered and it's set for a Pickup, then the price should change to $7.95 for that pizza. Another solution might be to replace the data file that contains the pizza prices with Tuesday prices on Tuesday then change back to old data file for the other days. I don't mind how you solve the problem as long as the program functions normally. I have attached the full list of pizzas that have the Tuesday special price along with their product code. I can also provide a text view of the product codes if you would like. I will also provide you with my teamviewer details so you can work directly with the EFO software and it's files. Will not release any milestone until the job has been completely finished.