Dr. Bean (Historian) gives Anzac casualties as: Australian 26,094 (7594 killed), New Zealand 7571 (2431 killed).  The Australian War Memorial at Canberra gives the Australian casualties as 8709 killed and 19,000 wounded.
Norman Henry Sohier
a u s t r a l i a  &  n e w  z e a l a n d  a r m y  c o r p s
One source gives Allied casualties, including deaths from drowning and accident, as about 265,000, of whom some 46,000 were killed in action or died of wounds or disease.
The German Dardanelles commander, General von Sanders, states that Turkish casualties were about 218,000 with around 66,000 of these being killed.
Dr. Bean (Historian) gives Anzac casualties as: Australian 26,094 (7594 killed), New Zealand 7571 (2431 killed).  The Australian War Memorial at Canberra gives the Australian casualties as 8709 killed and 19,000 wounded.
The New Zealand official figures given with their World War I statistics issued in 1932 also show a higher proportion of killed, 2721, and a total casualty figure of 7247.
Dr. Bean, whose research was most carefully carried out, gives the total British loss as 119,696 (43,000 killed) and the French as 27,004 (8000 killed).
The greatest visible loss (and to morale, too) was the sinking of six battleships, one French and five British: on March 18, mined during the attempt to force the Straits, Bouvet (French) HMS Ocean and Irresistible; on the night of May 12/13, torpedoed in Morto Bay, near Helles, HMS Goliath; on May 25, torpedoed off Gaba Tepe, near Anzac, HMS Triumph; and on May 27, torpedoed off Helles,
HMS Majestic.
Many transports and supply ships also fell victim to German and Austrian submarines.
Source: Gallipoli :: The Incredible Campaign by Tim Swifte 1985 :: Published by Magazine Promotions Australia Pty. Ltd., 57 Regent Street, Sydney.
Tim Swifte
Tim Swifte 1985.
A journalist and army lieutenant-colonel whose "tremendous admiration" for the Anzacs first inspired a series of Anzac Day radio and TV broadcasts.  "The Anzac epic is very much part of our heritage," says Tim, who wrote this book because "people shouldn't be allowed to forget" the heroism and sacrifices of Gallipoli 70 years ago.  Gallipoli - The Incredible Campaign is therefore written for the general public, not to add to the tomes of war history gathering dust in archives.  But it is thoroughly
researched and contains material which has not been published before.
Note: The book was priced at $4.95 - 131 pages (8" x 11").  An excellent resource.  It may be available at your public library. 
No assessment could ever be made of the cost of the Dardanelles campaign in lives, suffering, loss of ships and expenditure on equipment and munitions.  Even an exact figure for casualties does not exist because of the conditions under which the campaign was fought.