The problem is user selection can be x weeks/x months etc...then I will have a formula to evaluate each selection and then convert into number of days. Not sure if Flow supports multiple if conditions.
This is my calculated EquipEndDate in List.
=IF([Duration]="WEEK",[EquipStrDate]+(EquipDuration*7),IF([Duration]="DAY",(EquipDuration+[EquipStrDate]),IF([Duration]="MONTH",DATE(YEAR([EquipStrDate]),MONTH([EquipStrDate])+EquipDuration,DAY([EquipStrDate])),IF([Duration]="YEAR",DATE(YEAR([EquipStrDate])+EquipDuration,MONTH([EquipStrDate]),DAY([EquipStrDate]))))))