In using a guitar amp, it's important to know how to manipulate the amplifier to achieve a number of different effects, including a clean or dirty sound. Learn about using the bass and treble knobs on an amp with help from a professional guitarist in this free video on guitar amps.
A 10 X 13 envelope (must be less than 1/4 inch thick) is considered a flat and costs 80 cents for the first ounce and 17 cents for each fractional ounce after that up to 13 ounces.
Report Abuse. A first class letter, #10 envelope, price is 39 cents if you are only sending one. If you suspect your letter is more than 1 ounce, please take it to the post office and have them weigh and meter it for you.or a letter that weighs less than one ounce, a 39 cent stamp will get it anywhere in the USA using standard mail. If you are uncertain if the weight, you should take it to the post office to have it weighed and apply the correct postage.