$S$15: =AVERAGE(Q15:R15)
$S$16: =AVERAGE(Q16:R16)
$S$17: =AVERAGE(Q17:R17)
$S$18: =AVERAGE(Q18:R18)
$S$19: =AVERAGE(Q19:R19)
$S$20: =AVERAGE(Q20:R20)
$S$21: =AVERAGE(Q21:R21)
$S$22: =AVERAGE(Q22:R22)
$S$23: =AVERAGE(Q23:R23)
$S$24: =AVERAGE(Q24:R24)
