This is the 10489th most frequent Russian word.
взносам
"Взносам" means "contributions" or "payments" (dative plural form).
In this sentence, 'взносам' ('contributions') is used in its dative plural form, indicating the expenses are directed towards or associated with contributions.
Эти расходы относятся к обязательным взносам.
These expenses relate to mandatory contributions.
Here, 'взносам' is again in the dative plural form, representing the entity receiving the action of monitoring or adjustment.
Мы будем следить за вашими взносам и корректировать их при необходимости.
We will monitor your contributions and adjust them as necessary.
In this example, 'взносам' is in its dative plural form, showing association or relation to the contributions in the agreement.