“…Shanmugasundari and Ganesan, in 2013, proposed a fuzzy modified distribution algorithm and a fuzzy approximation method of Vogel to solve FTP with FNs [31]. Gani and Abbas, in 2014 [4], and Kathirvel, and Balamurugun, in 2012 (see [27], [28]), proposed a method for solving TP in which the quantities demanded and offered are represented in the form of the trapezoidal intuitionistic FNs (IFNs). In well-known and commonly used methods, proposed by Basirzadeh [17], Gani et al [2], Pandian and Natarajan [34] and Dinagar and Palanivel [11], there is a problem that, in a general case, neither the cost values, nor the obtained fuzzy optimal solution need necessarily to be non-negative fuzzy numbers.…”