General concensus is the "going rate" for sleeve deals is 20% of main sponsorship. (Google can help you check that)
Elstone said SportsPesa & USM were paying a combined £75m over 5 years
Elstone said our new shirt sponsorship was a "three-fold" increase of the previous one
The previous one was £16m.
So the assumption is we're getting circa £9.6m per annum (£16m times 3, but over 5 years) for main sponsor
20% of £9.6m = £1.92m
Next question, if a Koppite starts walking from their ground to the (Moshiri owned) Liver Building at 4mph, an Evertonian cycles from Goodsion to BM Dock at 7mph and a Tranmere fan sails over the river at 9 knots plus a following wind where did the Arteta money go?