<prompt> Translate the following text to EnglishIngawa mchanganyiko huo huongeza hatari ya malipo ya ziada, hatari zinaweza kupunguzwa kwa ufanisi ikiwa mpango wa sampuli uliotengenezwa unahakikisha kwamba akiba inayotarajiwa inazidi gharama zilizopangwa.  <response>: Although such a combination increases the risks of overpayments occurring, the risks can be effectively mitigated if the sampling plan developed ensures that projected savings exceed estimated costs. 