Complex sentence: For the 1988 model year, Blue Bird supplemented the long-running All-American school bus line with the lower-priced TC/2000 transit school bus, which was intended to secure bids from larger fleet operators.
Split into simpler sentences: For the 1988 model year, Blue Bird supplemented the All American school bus line with the TC/2000 transit-style school bus. Unlike the premium All American, the TC/2000 was priced lower in an effort to secure bids from larger fleet operators.