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.
Without a human hosts, most lice will only live for a maximum of 48 hours. This is why sealing clothes and toys after infection in a plastic bag is a great way to get rid of lice. Lice on a human host can survive two or three weeks.