Answer :
Given
15 % Comminsion on total
$30 in Shampoo
20% tip total bill
Commission
$30 * 15% = 4.5
Tip
70 * 20% = 14
Total = 4.5 + 14 = $18.5
Given
15 % Comminsion on total
$30 in Shampoo
20% tip total bill
Commission
$30 * 15% = 4.5
Tip
70 * 20% = 14
Total = 4.5 + 14 = $18.5