But those lower costs arent yet being felt in any meaningful way at grocery stores.

Union leaders said last month they reached an agreement with the Big 3 that increases wages across a four-and-a-half year deal and provides cost of living adjustments.The tentative agreements are making their way across UAW chapters.

The deals also eliminate the two-tier system at a handful of Big 3 plants.according to a vote trackermaintained by the UAW.Rank-and-file GM workers from 11 different UAW chapters have rejected the automakers proposal in recent days.

labor experts told CBS MoneyWatch.The tier system was a concern for union members from the start.

It also is possible that the contract will be approved at one automaker but not at the other automakers.

Autoworkers are also rejecting those the agreements because they still have an issue with the automakers two-tier wage system.Any physician could use the code.

It also triggered a tussle that highlights ongoing tension in Medicare physician payment rules.Every year of work there erases one year of the debt covered by their award.

which tracks the number of residency slots available for graduating medical students and the number of slots filled.How Medicare drives paymentMedicare.