By 1968, 85 manufacturers had sold over 2.4 million players.

Over all, manufacturers sold 279,803 cars in late March, an increase of 2.7 percent.

The 10 domestic manufacturers sold 136,754 cars, an increase of 27.5 percent.

"The real test will be if manufacturers can sell these cars in the third quarter," he said.

"Manufacturers of the top 10 brands are selling just about everything they can."

How can manufacturers and retailers understand what products sell better in different parts of the country?

Manufacturers often provide cases with their players or sell them as extras.

Some manufacturers do not sell directly to the public, and only work with funeral homes.

"And that won't help the manufacturers sell even one receiver."

Although parents can still use car seats with older mechanisms, manufacturers can't sell them.