At the end of next accounting period, bad debts are estimated again and the balance in the allowance account is adjusted. There are two commonly used methods to estimate and adjust the balance of allowance account: 1  Percentage of Sales Method.  Percentage of Receivables Method.
Comfrey has been cultivated as a green vegetable and has been used as an herbal medicine for more than 2,000 years. Comfrey's original name, knitbone, derives from the external use of poultices of its leaves and roots to heal burns, sprains, swelling, and bruises. In Western Europe, comfrey has been used topically for treating inflammatory disorders such as arthritis, gout, and thrombophlebitis, and internally for treating diarrhea.
Story at-a-glance 1  +. Comfrey oil is extracted from comfrey (Symphytum officinale), a perennial herb of the Boraginaceae family with a black, turnip-like root and large, hairy broad leaves bearings small, bell-shaped flowers. 2  The plant has found widespread use in folk and herbal medicine, acting as a healing agent.omfrey, while considered an important herbal medicine, is controversial due to its toxic components which led to the banning of oral products. The dilemma is how to weigh the virtues of Comfrey oil while considering the safety concerns that surround it.