Viksim, this is the solution:
• Alex's base salary = $ 2,200
,
• Alex's commision = 10% of total vacuum cleaners or 0.1
,
• Total sales one month = $ 4,300
In consequence,
• Total salary = Base salary + Commission
,
• Total salary = 2,200 + (0.1 * 4,300)
,
• Total salary = 2,200 + 430
,
• Total salary = 2,630
Alex earned $ 2,630 of total salary