Answer: The manager should sell the chair for $1740.
Step-by-step explanation:
45% of 1200 Â Â Â Solve this to find the amount increase
0.45 * 1200 = Â 540 Â Â Â Now add this amount to find the price.
$1200 + $540 = $1740
or  you could do it this way
100% + 45% = Â 145%
145% of 1200 =?
1.45 * 1200 = 1740