Some enthymemes...

WATCO spending about $120.00 on a rocking baby chair that plays music and nature sounds ON your success in college?
Audience:
College-attending parent (or spouse thereof) of an infant
Someone who has the financial wherewithal to buy a chair of that price
Someone who needs to improve or maintain grades in college courses

Spending about $120.00 on a rocking baby chair that plays music and nature sounds will improve your success in college B/C the chair will entertain and/or put your child to sleep, allowing you to successfully study and do homework assignments.
Whatever will allow you to successfully study and do homework assignments will improve your success in college.

Okay, this next enthymeme may not be all that applicable, since nobody even thinks about eating an entire box of doughnuts each morning of the week.

WATCO eating an entire box of Krispy Kreme doughnuts each morning of the week ON your health?
Audience:
Someone who can eat doughnuts
Someone who is concerned about health
Someone who has an available Krispy Kreme nearby
Someone who has time in the morning to eat doughnuts
Someone who is willing to eat breakfast

Eating an entire box of Krispy Kreme doughnuts each morning will be detrimental to your health B/C your LDL cholesterol count and calorie intake will increase to excessive levels.
Anything which will increase your LDL cholesterol level and calorie intake to excess will be detrimental to your health.