PROFIT AND LOSS AND BALANCE SHEETS 6.3 P 214 Cost of sales is: Value of stock at start of time period + Value of stock bought in this period = Total stock available to be sold-Value of stock left at end of period = Cost of sales for the time period For every single bit of goods or services you supply to others, there will be costs to pay
Head lice can survive on a human host for approximately 30 days. They generally cannot survive longer than 24 hours off the host. A female louse lays 3-5 eggs a day. The eggs hatch in 7-10 days and it takes another 7-10 day for the louse to mature and lay their own eggs.
A head louse lives on average 30-days after it hatches from the egg. Eggs take around 7-days to mature and then hatch. Newly hatched head lice are fully mature in just 7-10 days. Therefore, most are active in your hair for about 21-days.