Thank you! I tweaked it a bit and it is working. Below is how I amended it
IIf(Weekday(([ServicePeriod]*30)+[ServiceDate])=1, ([ServicePeriod]*30)+[ServiceDate]+1, IIf(Weekday(([ServicePeriod]*30)+[ServiceDate])=7, ([ServicePeriod]*30)+[ServiceDate]+2, ([ServicePeriod]*30)+[ServiceDate]))...