Retail sales of Class A and Class C motorhomes plunged 27.3% in March, according to Statistical Surveys Inc., an independent market research firm.

A total of 4,239 Class A and Class C motorhomes were sold by dealers during March, compared with 5,832 units sold a year earlier, according to Statistical Surveys.

During the first quarter, retail sales of Class A’s and Class C’s fell 25.1% to 9,953 units, compared with 13,285 units retailed during the first three months of 2000.

The March and first quarter figures did not include sales by dealers in South Carolina, because that state did not report its data on time, according to Statistical Surveys.

Separately, Class A motorhome sales plunged 27% in March to 3,039 units, compared with 4,165 units retailed during March 2000.

During the first quarter, Class A retail sales declined 25.1% to 7,346 units, compared with 9,814 units sold during the first three months of 2000.

Meanwhile, Class C motorhome retail sales fell 28% in March to 1,200 units, compared with 1,667 units retailed a year earlier.

During the first quarter, Class C retail declined 24.9% to 2,607 units, compared with 3,471 units sold during the first quarter of 2000.