The allies don't know the German casualties, even today, only estimated. Make a notice that the German casualties are much less than the allies.
From D-Day Musemum:
How many Allied and German casualties were there on D-Day, and in the Battle of Normandy?
“Casualties” refers to all losses suffered by the armed forces: killed, wounded, missing in action (meaning that their bodies were not found) and prisoners of war. There is no "official" casualty figure for D-Day. Under the circumstances, accurate record keeping was very difficult. For example, some troops who were listed as missing may actually have landed in the wrong place, and have rejoined their parent unit only later.
In April and May 1944, the Allied air forces lost nearly 12,000 men and over 2,000 aircraft in operations which paved the way for D-Day.
Total Allied casualties on D-Day are estimated at 10,000, including 2500 dead. British casualties on D-Day have been estimated at approximately 2700. The Canadians lost 946 casualties. The US forces lost 6603 men. Note that the casualty figures for smaller units do not always add up to equal these overall figures exactly, however (this simply reflects the problems of obtaining accurate casualty statistics).
Casualties on the British beaches were roughly 1000 on Gold Beach and the same number on Sword Beach. The remainder of the British losses were amongst the airborne troops: some 600 were killed or wounded, and 600 more were missing; 100 glider pilots also became casualties. The losses of 3rd Canadian Division at Juno Beach have been given as 340 killed, 574 wounded and 47 taken prisoner.
The breakdown of US casualties was 1465 dead, 3184 wounded, 1928 missing and 26 captured. Of the total US figure, 2499 casualties were from the US airborne troops (238 of them being deaths). The casualties at Utah Beach were relatively light: 197, including 60 missing. However, the US 1st and 29th Divisions together suffered around 2000 casualties at Omaha Beach.
The total German casualties on D-Day are not known, but are estimated as being between 4000 and 9000 men.