Count Sickness days excluding weekends

Hi,
I have a holiday and sickness chart for all of the guys in my maintenance department for the whole of next year (2014). The holidays part works fine. The sickness is split into two areas; the number of occurrences of sickness and the total number of days sick. To make the formula work for the number of occurrences it is necessary to enter sick in both Sat and Sun if the sickness spans the weekend. But we do not work the weekend and so I do not want to count those two days. The formula needs to cover the entire year (cells BL5:ZL5). The calculation that I am currently using is =COUNTIF(BL5:ZL5,"Sick")/2 (divided by two as we log a.m. and p.m. and the answer is in days). In the example attached, it would be 1 occurrence of sickness and 3 days sick, not 4 as shown.

For completeness, the formula that I am using for the occurrences is =SUMPRODUCT((BL5:ZL5="Sick")*(BL5:ZL5<>BK5:ZK5))

Thanks,

Cliff