Answer:
B. 1.38 kilograms
Step-by-step explanation:
Special metal 0.38 kilograms
Allowance for waste is 0.2 kilograms
Allowance for rejects is 0.8 kilograms
The addition of all will be:
0.38kg + 0.2 kg + 0.8kg = 1.38 kilograms
Therefore the standard quantity of metal per earring is 1.38 kilograms.