Though he was relieved to hear it, Greg didn't show it on his face. Working for two Weasleys was even worse than working for one - not to mention, Greg liked Ron even less than he liked George. Every time he brought up his job at home, his mum reminded him what a great thing it was, being 'accepted' by the Weasleys. Greg didn't understand it - he still considered it to be an insult to be associated with them, and that might never change.
"Fine," he grunted, moving away from Ron towards the shelves where the dungbombs were kept - noticeably depleted from a weekend of sales. "Then I'll get on with it." He didn't want Weasley telling him what to do, though knowing Ron it would happen sooner rather than later. At least there'd be someone else in the shop to deal with customers.