Rina lacks cash to pay for a $860 dishwasher. She could buy it from the store

Rina lacks cash to pay for a $860 dishwasher. She could buy it from the store on credit by making 12 monthly payments of $80. The total cost
would then be $1020. Instead Dorothy decides to deposit $80 a month in the bank until she has saved enough money to pay cash for the dishwasher. One year
later she has saved $1027.20%u2014$960 in deposits plus interest. When she goes back to the store she finds the dishwasher now costs $1113.60. Its price
has gone up 16 percent the current rate of inflation.

From the financial standpoint was postponing her purchase a good trade-off for Rina?