Find the weighted average cost ofcapital for Dunkin' Brands Group, Inc. (DNKN) on gurufocus.com and thatswacc.

Find the weighted average cost of capital for Dunkin' Brands Group, Inc. (DNKN) on gurufocus.com and thatswacc.com then explain the difference in the WACC as calculated on the two websites and explain the WACC in the context of a hurdle rate, return on invested capital (ROIC), an optimal capital structure, an optimal capital budget, and the golden rule of value creation.