about 146,000,000 were sold in the US
Calculators help us by giving us the answers to problems we don't understand or know.
Casio and Sharp and Helix are the biggies
how many hot tubs are sold annually in the US
Most scientific calculators that are sold today have plenty of solar and battery powered sources, so you have a wide array of choices.
If you mean hand-held calculators, HP has sold an extensive line of them since the beginning of the hand-held pocket calculator era.
100.000.000 ipods were sold in the us
12.8 million cars got sold in 2011 in the US
23,789,567
a gazillion
174,0000+
how many new cars are sold each year