TRAIN TRAVEL FOR UP TO 8 PEOPLE ON SATURDAY 17TH MARCH FROM INVERNESS TO GLASGOW ?

this is train travel for 6,7 or 8 people from inverness to glasgow on saturday 17th march,leaving inverness at 8:45am and returning on 7:45 in the evening of the same day,ideal for a day trip,it is reserved seats, 2 tables across from each other on the train,i have the tickets in hand,it is £90 for the whole group to travel RETURN