Answer:
Margin of safety in units 1040 - 890 = 150
Margin of safety in dollars 28,080 - 24,030 = 4050
Margin of safety as % of sales 4050 / 28,080 = 14.4231%
Step-by-step explanation:

27 - 13 = 14

12460 / 14 = 890

890 * 27 = 24,030

1,040 * 27 = 28,080

Margin of safety in units 1040 - 890 = 150

Margin of safety in dollars 28,080 - 24,030 = 4050

Margin of safety as % of sales 4050 / 28,080 = 14.4231%