WITH regard to Ms Castelino's letter comparing the price of Towngas with Shellgas, (Sunday Morning Post, June 27), she has made the assumption that a ''unit'' of Towngas was the same as a ''unit'' of Shellgas. This is incorrect, because Towngas and LPG are measured in different units which are not strictly comparable. Thus the comparison stated in her letter is a little like comparing apples with oranges. I can assure Ms Castelino and all our Shellgas customers that Shellgas is fully competitive with Towngas. If Ms Castelino wishes to contact the undersigned at 847-8000, I welcome the opportunity to explain to her more fully a fair comparison of the pricing of gas. ROBERT YOUNG Director, Hongkong & Macau Shell Hongkong Ltd
