A Group A, Div 1 occupancy is 200`x300`x80` high, 80% occupied. A 10 stage recripricating system using R-22 will be used and is classified as a direct system. According to the UMC, what is the maximum amount of refrigerant permitted?

A Group A, Div 1 occupancy is 200`x300`x80` high, 80% occupied. A 10 stage recripricating system using R-22 will be used and is classified as a direct system. According to the UMC, what is the maximum amount of refrigerant permitted?