List and net pricing workbook formula

I'm creating a workbook for our list and net pricing for one of our products. I have two sheets so far. Sheet 1 will show the list and net pricing while sheet 2 has our costs for the product. I need help creating a formula that will take our costs from sheet 2, multiply that by the tariffs, plus freight. Then I would need for it to multiple that result by 3 to get our net price. Then I would need to take our net price and divide that by .3 to get our list price. The list price would also need to be rounded up to the nearest $0.25.

Can someone help me with that?