Lizzy: John buys 1.5 ounces of silver and twice as much gold. The silver costs $20 per ounce. The gold is 50 times more expensive per ounce. How much does he spend on everything?.
Me: Hmmm, let me think. I think this is the detailed solution:
He buys the silver for 1.5 * $20 = $30. He bought 1.5 * 2 = 3 ounces of gold. The gold is worth %20 * 50 = $1000 per ounce. So he buys 3 * $1000 = $3000 on gold. So he spent $30 + $3000 = $3030 on everything. Final answer: 3030.