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.
Head lice cling to hair shafts near the scalp. Adult females glue eggs on hair shafts close to the scalp, usually behind the ears and on the nape of the neck. Eggs hatch after 5 to 10 days. Young head lice (called nymphs) are mobile and molt three times, developing into mature adults in about three weeks. Adults can live for about four weeks but do not lay eggs until after seven days. Head lice do not survive off a host for more than one or two days. Head lice do not jump or fly. They can however move from an infested person to another person during play or other close contact.