LOS ANGELES (CBS) — Unionized grocery workers across the Southland are voting on a controversial health care proposal, as well as whether to authorize a strike.

They already voted to authorize a strike in April, but a new contract is now being proposed by Ralphs, Vons and Albertsons.

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Workers voting Friday and Saturday have already been without a contract for nearly six months.

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Healthcare has been the sticking point, as employees say they would need to spend nearly half of their salaries on medical expenses.

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The companies, however, say workers would only have to pay about $10 a week for individual coverage.