Quảng cáo chi phí tốn nhưng không hiệu quả. Chưa rõ phương thức quảng cáo rẻ tiền (qua mạng xã hội). CBO thiếu kĩ năng bán hàng, do vậy cần đào tạo bán hàng.
Advertising costs were expensive but ineffective. Unknown cheap advertising methods (through social networks). The lack of sales skills, CBO therefore need sales training.
Advertising costs consuming but ineffective. It is unclear cheap advertising methods (through social networks). CBO lack sales skills, so need sales training.