While many entry-level data entry clerks work as part of a team, smaller companies may have data departments consisting of one or two people. Because data entry requires long periods of time spent at a computer, clerks often experience eyestrain and repetitive motion disorders.
Summary of the 2015 Postage Rate Increase: 1  First Class Mail Letters (1 oz.) will remain the same at $0.49 when purchased at the Post Office. 2  Each additional ounce will cost $0.22 (up one cent from 2014). First Class Package Service will see an increase of 5.1% in 2015. 2  Commercial Base (online postage) rates will start at $2.04 (1 oz.), up $0.11 compared to 2014. 3  Priority Mail rates are NOT INCREASING in 2015. 4  Commercial Base (online postage) rates will continue to start at $5.05.
First-class mail is the most common postage category and includes letters, cards, flat packages and small parcels. Letters mailed first-class must be under 1 ounce to use the 49-cent stamp. If a letter is between 1 and 3.5 ounces, it costs between 70 cents and $1.12 to mail. Postcards mailed first-class cost 34 cents an ounce up to 3.5 ounces. The USPS considers letters above 3.5 ounces as large envelopes and prices them accordingly.