Volume discount is given based on the basic monthly fee. The more test you purchase, the higher volume discount you may get.

Basic Monthly Fee Volume Discount
< R$0.50 -
>= R$0.50 20%

Contractual discount is given if you prepaid for a longer period.

Contract Period Contractual Discount
Monthly -
Quarterly 5%
Half-yearly 10%
Yearly 15%

Multiple discounts will be applied concurrently if you fulfilled each condition.