how many ounces is one u.s. dry pint
Dry ounces and  fluid ounces are not interchangeable. Fluid ounces are a measure of  volume and dry ounces are a measure of weight or mass.   There are 16 fluid ounces (~473.6 ml) in a US pint and 20 fluid  ounces (~567.5 ml) in a UK pint.