answer:You are going to need to detach the lining from the sleeve hem, shorten the sleeve, and then retack the lining by hand to the inside of the sleeve. If you’re not familiar with this type of sewing, you might want to check with a dry cleaner and see how much they charge for this sort of work. Even at $30, it’s a good deal on a $17 suit, because correctly done, it will keep the suit looking professional. It’s not what you pay, but the value. A $500 suit is a $500 suit, even if you pay $17 for it.