Some precalculations:

• My weight: 74.15 kg
• Empty bucket: 1.15 kg
• Total: 75.45 kg

Bucket #1 (CS):

• Total: 86.80 kg
• Grapes: 12.65 kg

Bucket #2 (CS):

• Total: 85.80 kg
• Grapes: 11.65 kg

Bucket #3 (PS):

• Total: 89.15 kg
• Grapes: 15.00 kg

Bucket #4 (PS):

• Total: 90.05 kg
• Grapes: 15.9 kg

What in sum runs as:

• Cabernet Sauvignon: 24.3 kg
• Petite Sirah: 30.9 kg
• Total: 55.2 kg (121.695 lbs)