bar model: Box B vs Box C vs Box A (total: Total = 1,085 g)
Draw a bar model: A = 1 unit, B = 1 unit + 250, C = 1 unit + 190.
Total = 3 units + 440 = 1,085.
Total in units=1 + 1 + 1 = 3 units + 250 + 190 = 3 units + 440 = 1,085
3 units=1,085 - 440 = 645
1 unit (A)=645 รท 3 = 215 g
C = 1 unit + 190=215 + 190 = 405 g
Final Answer: 405 g