Every frugal shopper counts his or her coupons before he or she shops.
Shopper is singular so your pronoun has to be singular as well.
Wrigley Houston states, "Today teens are so reliant on technology that learning to drive is no longer a high priority. Teens are more focused on technology that 20 % of 16 year olds socialize online more than in person."
The main idea in this paragraph is that different cultures have different ideas on marriage. Some marry for romantic love, some for a benefit, and others for status. Notice that these different ideas of marriage were from different cultures.
I hope this helped you!