Why did'nt he just say tripled. But would of expected an even bigger increase if compared with last Monday. Perhaps they meant compered to same period in previous years
What kind of shopping? If it was shops that were closed last week then it couldn't have gone up by 200% (which is indeed tripled) because a 200% increase on nothing is nothing.
I'm just thinking of my local high street that during lockdown probably only ever had about 10 people wandering it at any time during lockdown (as Boots and Superdrug were the only open shops) so 30 with all the shops open is very little more. It's all relative I suppose.