It does seem rather high. Could be a mistake in the book.
***
2 January 1942
The small Finnish detachment occupying
Suursaari (Gogland) is forced to retreat under a Soviet attack.
Finnish daily losses: 26
***
3 January 1942
Soviet attack on the Maaselkä Isthmus continues.
Finnish daily losses: 35
Finnish troops prepare to attack Jyvälahti in Northern Finland.
***
4 January 1942
More schools are opened in Karelia.
Finnish daily losses: 54