4 little paragraph grammar correction

Hi,
Can a teacher correct the paragraphs please?

The only way to get her name out and make a name for herself in the business was to place an ad on a fashion blog with a link of her internet site which cost $40 a month. This particular blog charges $10 fewer than other blogs. $40 for a boost in career is cheap.

As a singer, you need to know how to record a record through heartbreaks. If you need time to get over a boyfriend, you might not record much.

Tachycardia is a condition where you hear beats faster higher than normal. Tachycardia is a faster than normal heart rate. People with Tachycardia need to take medication to slow heart beat. Image having to go to sleep with a fast heart beat. You would have a hard time falling asleep knowing your heart is racing.

In order to make the same amount of money, I had to sell 3 products where other salesmen had to sell only 1. My products aren't as expensive.