Your VLookups are not closed properly
=IF(Input!A2<1,"",IF(Input!C2<3,VLOOKUP(Input!B2,Input!$E$2:$J$12,2,FALSE),IF(AND(Input!C2>2.99,Input!C2<4),VLOOKUP(Input!B2,Input!$E$2:$J$12,3,FALSE),IF(AND(Input!C2>3.99,Input!C2<4.5),VLOOKUP(Input!B2,Input!$E$2:$J$12,4,FALSE),IF(AND(Input!C2>4.49,Input!C2<5),VLOOKUP(Input!B2,Input!$E$2:$J$12,5,FALSE),IF(AND(Input!C2>4.99,Input!C2<6),VLOOKUP(Input!B2,Input!$E$2:$J$12,6,FALSE)))))))