Need to calculate a due date in business days

I need a formula to calculate a business day due date based off the received date and request type.

Currently I have this setup calculating calendar days:

Column E: Received Date

Column G: Request Type; It is a drop-down where the user can pick either Expedited or Standard.

Column H: Allotted number of days; Current formula: =IFS(G2="Expedited", 3, G2="Standard", 5)

Column I: Due Date; Current formula: H2+E2

I need Column I to show the result of Column E + 5 *business* days instead of calendar days (when Standard is selected in column G). Expedite should be 1 calendar day. How would I go about doing that?

Using Excel for 365 version 2512 64 bit