Which has the lower unit price? Soap brand A: $1.31 for 3 bars brand B: $1.44 for 4 bars

To find the lower unit price, we need to calculate the price per bar for each brand.

For brand A: $1.31 ÷ 3 bars = $0.437 per bar
For brand B: $1.44 ÷ 4 bars = $0.36 per bar

Therefore, brand B has the lower unit price of $0.36 per bar.