Answer:
Let x be the amount of sales Ryan made in that month.
Ryan's commission on the sales would be 5% of x, which is 0.05x.
Adding the commission to his base salary gives his total income for the month, which is $1400 + 0.05x.
Since his paycheck for the month was $1710, we can write the equation:
$1400 + 0.05x = $1710
To solve for x, we can first subtract $1400 from both sides:
0.05x = $310
Then divide both sides by 0.05:
x = $6200
Therefore, Ryan made $6200 in sales that month.