Can you please check these sentences for me? Thank you.

1)Herewith I'd like to know if it is possible to upgrade my reservation for a family room to (?) Your New Premier Club Room.
2) The total price for the two nights will then be of ..... Euros and includes (?) 4 Full Irish Breakfasts per day plus a children's breakfast.
3) As it is usually very hot with a temperature of over 30 degrees, I bathe 4/5 times a day.

1)Please let me know if it is possible to upgrade my reservation from a family room to your new Premier Club room.

2) The total price for the two nights will then be 335 Euros and includes four full Irish breakfasts plus a child's breakfast per day.

3) Because it is usually very hot with a temperature of over 30 degrees, I bathe four or five times a day.

["4/5 times" = four-fifths of a time!! Impossible!!]