[csThor]

Losses per sortie are not exactly a viable reference size unless both air forces are not only equal but identical. The VVS often had the numerical superiority and that became more pronounced in 1942 (exceptions were local occurences and owed to combat losses, a concentration of Luftwaffe forces at the expense of other sectors and similar facts).

A total number is probably always going to end in "approximate losses". BC/RS 3 lists the following losses for the VVS and Luftwaffe for the timeframe July to November 1942 (page 224):

VVS

Lost in air combat: 7415
Lost to AAA: 1642
On the ground: 487
Total: 9544

Luftwaffe

Lost in air combat/to AAA: 1039
On the ground: 96
Total: 1135

Interesting is the relationship between losses in air combat (don't know if the numbers include missing aircraft as well) versus claims. In this timeframe the VVS claimed 4500 german aircraft (losses include losses to AAA, don't know exact number of losses in air combat; overclaiming of 4,33:1) and the Luftwaffe claimed 14153 victories in air combat (includes approximate number of claims for various german Jagdgeschwader so the number is probably not that accurate, though; overclaiming of 1,9:1).