∵150克=0.15千克,50克=0.05千克,500克=0.5千克, (0.15×2.4+0.05×15+0.05×6.4+0.3+12)÷50 =﹙0.36+0.75+0.32+0.3+12﹚÷50 =13.73÷50 =0.2746 答:制作这种点心的单位成本是每个0.2746元。