The Box Manufacturing Division of the Allied Paper Company reported the following results from the past year. Shareholders require a return of 4​%. Management calculated a weightedminusaverage cost of capital​ (WACC) of 3​%. ​Allied's corporate tax rate is 40​%.Sales$ 400 comma 000Operating income60 comma 000Total assets1 comma 100 comma 000Current liabilities900 comma 000What is the​ division's sales​ margin?