To calculate Sandra's overtime earnings, you will need to find how many overtime hours Sandra worked and then calculate the amount per hour she will make for the hours over 40 she worked through Saturday.
You will calculate her earnings per hour on Sunday by doubling her per hour rate and then multiplying by the number of hours worked on Sunday.
1. M - F (9 x 5 = 45 hours), so 5 hours overtime and Saturday - is 6 hours (6 + 5 = 11 hours overtime through Sat).
2. $12 x 1.5 = $18 per hour overtime rate; 18 x 11 = $198 through Sat.
3. Sunday: $12 x 2 = $24 per hour; $24 x 4 = $96 on Sun.
4. $198 + $96 = $294
Sandra earned $294 in overtime.