Total Weight Loss (\( L_t \)):

\[ L_t = L_r + L_m + L_i + L_r + L_b + L_s \]

Where:

• \( L_t \) is the total weight loss, in kilograms (kg).
• \( L_r \) is the weight loss due to respiration, in kilograms (kg).
• \( L_m \) is the weight loss due to microorganism, in kilograms (kg).
• \( L_i \) is the weight loss due to insect, in kilograms (kg).
• \( L_r \) is the weight loss due to rodents, in kilograms (kg).
• \( L_b \) is the weight loss due to birds, in kilograms (kg).
• \( L_s \) is the weight loss due to spillage, in kilograms (kg).