Контекст:
As you know, all these years we have not increased our prices for you,
> even
> though our 2 pair packages now sell for $2.75 and 4 pairs for $4.75.
> Packaging, material, everything goes up in price almost every 6 months
> here.
> This is a saving that we pass on to you, by not increasing your price.

Заранее большущее спасибо.