Tack will be applied at 0.05 gal/SY residual asphalt cement over 20,000 SY. Emulsion residue is 60 percent and emulsion weighs 8.3 lb/gal. Approximately how many tons of emulsion should be bid?

1. 1.4 tons
2. 2.3 tons
3. 6.9 tons
4. 13.8 tons