To be deductible, a business expense must be both ordinary and necessary. An ordinary expense is one that is common and accepted in your trade or business. A necessary expense is one that is helpful and appropriate for your trade or business. An expense does not have to be indispensable to be considered necessary. It is important to separate business expenses from the following expenses:
A duple meter metronome that is useful for 2/4, 2/8, 2/2 (cut time), and 6/8 when it has two beats per measure.
HYDROMETER ANALYSIS (ASTM D 422) Application . Hydrometer analysis is done to measure the proportion of particles smaller than 0.075 mm. Equipment . ASTM 152H Hydrometer . Mixer cup . Two 1000 cc graduated cylinder . Thermometer . Constant Temperature Bath . Sodium hexametaphosphate . Spatula . Beaker . Balance . Squeeze bottle . Rubber Stopper . Procedure . 1. Combine 50g (M