Focus on the pronunciation of stack up
English definition of “stack up”
stack up — Phrasal Verb with stack
/stæk/ verb [T]
› to produce a particular result or impression: How do the three project proposals and their financing stack up?stack up against sth What most firms want to know is how they stack up against their competitors.
› FINANCE, ACCOUNTING if accounts, prices, figures, etc. stack up, they seem to be accurate or show that something is worth buying or investing in: The economics of buying US retail and commercial banking businesses do not stack up.
› to increase in number or amount: Problems in the industry have stacked up in recent months.