Briefly, the Minimum 1st Class fare was £26. That could be reduced to £23, if no meals were taken in the regular Dining Room.
Inside Single-berth rooms ranged in price from £42 [
A-deck] to £30 [E-47 aft on
E-deck]. Most could have a sofa or upper Pullman berth added for a second passenger at £28 to Minimum per berth. Here I am referring to the advertised rates. - Few passengers paid those rates.
E-deck: Most of the 3-berth outside rooms were £52 for 1; £31 each for 2 and £27 each for 3.
D-deck: Outside 3-berth rooms £65; £37 each for 2 and £30 each for 3.
C-deck: Inside room cost either £52 or £60 for 1 with 2 each costing £33 or £36 and 3 each £27 or £28. 3-berth Outside rooms £75, £42 each for 2 and £32 each for 3; while the Parlour Bedrooms cost £90 for 1; £100 for 2. - Rooms with bathrooms and/or Wardrobe rooms cost more. - The bathrooms for the forward rooms and the 12 en-suites at the after end of 1st Class cost £35. Wardrobe rooms cost £10, with the bathrooms for those rooms costing £45.
The Parlour Suites were £355 for 1 or 2 passengers. £10 for each additional passenger.
B-deck: Generally £5 to £10 more than
C-deck.
The Parlour Suites were not as is commonly believed £870; they were £660 for 1 or 2 passengers and a Servant. - £870 was the Summer Season rate.
The Suites of Rooms [comprising 2 bedrooms, private bath and lavatory and a Servant's room cost £304 for 1 or 2 passengers and a servant.
A-deck: Outside-single berth rooms were £60. The same on the Boat-deck except for "Y" which was £52. Outside single-berth rooms on B and C-decks were also £60. - £36 per berth for a 2nd passenger using a Sofa berth.
"Z" as with A-34 and A-35 was £85, £45 each for 2. A-3 and A-4 were £97 for 1, £53 each for 2 and £39 each for 3.
Single berths were not sold in the Parlour bedrooms and rooms with a private bathroom; otherwise depending on the size and location of the room [and if sharing with 1 or 2 other passengers] a berth could cost from £23 to £47.
Servants were £15.10/-.
I hope that gives a more detailed overview of the Room Rates.