To calculate the final cost of two pairs of shoes priced at $35 each with a buy one, get one 50% off sale, follow these steps:
- Cost of the first pair: $35 (full price)
- Cost of the second pair with 50% off: $35 × 0.50 = $17.50
Now, add the costs of the two pairs together:
\[ 35 + 17.50 = 52.50 \]
The final cost for two pairs of shoes under this promotion is $52.50.