What reason is given for the slight price increase?

Câu hỏi :

Part VII: Reading Comprehension
Directions: In this part you will read a selection of texts, such as magezine and newspaper articles, letters, and advertisements. Each text is followed by several questions. Select the best answer for each question and mark the letter (A), (B), (C) or (D) on your answer sheet.

Question 74 - 75 refer to following paragraph:
Date: April 22
To: All managers
From: Alan Turing
Re: Company Tennis Tournament
Please distribute this notice to all full-time employees

It’s that time of the year again – time to dust off your racket for our annual company tennis tournament! We were so pleased with the exceptional turn-out last year, and we’re hoping to see all of you again for more fun! We’ll be holding the tournament at the same location as last year, the Lanark Country Club, on Sunday, May 26. The matches start at 1:30, followed by our usual patio party and gourmet barbeque at
6:30. The price has gone up slightly to $40 because our caterer is charging more. But we’re also offering some more valuable prizes this year, including a 62-inch LCD TV for the winner and laptop computers for second and third place. So, we’re hoping to see some competitive spirit! Space is limited to 48; so, hurry and sign up. You can sign up with Ashley Briggs in Accounting. We’re looking forward to seeing you there!
74. What reason is given for the slight price increase?