228913 MS Excel Calculation

I need a MS Excel spreadsheet that I can enter the gallons of SOAP, WATER, or OIL and it gives me the calculations of water, OIL, and Misc. See below: I enter the gallons of SOAP (80%) then it calculates 15% water (I can change), 5% OIL (I can change). It shows ounces and gallons. Then Total of all. Or I can enter OIL and it gives me the gallons of SOAP and WATER, or Water. For instance I put in 25 Gallons SOAP (80%). It will then add 15% water, 5% OIL. But I can easily change it to SOAP 75%, 20% Water, 5% OIL, Then Total of all.