Appeal to her pride in the store

“I mean, you are such a model employee. The way you spotted me browsing outside and brought me in, inspiring!”

Sam shrugs. “Thanks?”

“I bet you are willing to do anything for your store! To make all the employees who wear that black shirt stand tall with pride, like partaking in an improvised publicity stunt!”

“So, you want me to honor the uniform by taking it out and flashing my tits?”

“Yes!”

“What if I instead take my shirt and shove up your-”

“Language Sam!” Robert yells.

Sam sighs, “No, and If you pester me again, I will put my uniform somewhere the sun doesn´t shine, understand?”

Well, that approach failed. Seems like the only way to get the merchandise now is if you do it or find another sucker to take your place.