 The cost of this strategy is 0.20 , that is, the mean number of tests required to screen 100 individuals is 20.
<fluency>  The cost of this strategy is 0.20 , that is, the mean number of tests required to screen 100 individuals is 20.
 The cost of this strategy is 0.20 ; that is, the mean number of tests required to screen 100 individuals is 20.