Victoria Beckham has been given a $5 million credit limit at top Beverly Hills fashion store Neiman Marcus.The Spice Girl - who moved to the US with husband David and their three sons last month after he joined the Los Angeles Galaxy soccer team - has been spending thousands of dollars on clothes ever since she arrived. A source revealed to In Touch Weekly magazine: "Victoria has been doing all she can to boost the US economy!"She went to Barney's in Los Angeles last week. She spent $3,670 on a Goyard cosmetics case, $5,745 on an Azzedine Alaia mini-dress and $4,995 on a purple Dolce and Gabbana dress."She has now been offered a $5 million credit limit at Neiman Marcus."Earlier this week, Victoria said: "I have been busy having a good look around Los Angeles, checking out the restaurants and the beauty parlours - you never know when you might need a facial!"She also revealed sons Brooklyn, eight, Romeo, four, and Cruz, two, have been doing plenty of shopping of their own.She said: "The boys are really looking forward to starting at their new school so we've got to make sure they are all kitted out with new schoolbags and pencil cases - you remember what it's like going back to school, you've got to have new everything!"