<prompt> Translate the following text to EnglishKiwango cha dola kilitolewa kwa kila aina ya LRS, kwa kutumia makadirio ya kati ya WTP IE, 1994 ili kuepuka kila dalili katika kundi na kudhani WTP ni nyongeza.  <response>: A dollar value was derived for each type of LRS, using mid-range estimates of WTP IEc, 1994 to avoid each symptom in the cluster and assuming WTPs are additive. 