Exam 1Y0-240 topic 1 question 46 discussion

Scenario: A Citrix Administrator currently manages a NetScaler environment in a retail company that is growing quickly and may soon double its volume of business. Currently, a NetScaler MPX 5550, which handles web and SSL transactions, is in place, but is close to full capacity. Due to the forecasted growth increase, the administrator needs to find a cost-effective solution.
What can the administrator recommend to management in order to cost effectively handle the growth?