rickets occurs when the body has a severe lack of vitamin d during the developmental years vitamin d is essential to the development of strong healthy bones
A clothes dryer should last an average of 10 to 15 years, according to consumer products experts.
Depending on the quality of the washer/dryer I would estimate it to fully depreciate within 10 years. Ten years = 120 months. Divide the original price of the washer/dryer by 120 months to determine the depreciation each month. Then multiply by how many months the family member has had it.