L1: 629×5=3145×0.89=2799.05→2799
L2: 388×3=1164
L4: 320×5=1600×0.93=1488
L5: 375×4=1500×0.89=1335
L6: 634×8=5072
L7: 329×12=3948
L9: 179×6=1074×0.97=1041.78→1041
Sum: 2799+1164=3963; +1488=5451; +1335=6786; +5072=11858; +3948=15806; +1041=16847
tax: (16847+409)=17256×0.08=1380.48→1380
total: 17256+1380=18636