Opening Sword & Shield Elite Trainer Box Plus [Zamazenta] returns about $30.91 in card value against its $232.52 price — roughly $0.13 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in Vivid Voltage
How expected value is calculated — card value only, from published pull rates and daily market prices.
Sword & Shield Elite Trainer Box Plus [Zamazenta] on TCGplayer