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.
They survive longer when on the scalp, but how long can head lice live without body contact? Lice are commonly spread from person to person by sharing personal items such as combs, brushes, hats, helmets, scarves, clothing and headphones. Pets can be a carrier for the lice but the lice cannot survive long on an animal. Females lay up to 400 eggs in their lifespan, which is spaced out to about eight eggs per day. These eggs hatch in one to two weeks. Head lice begin as empty eggs called nits.