a$.)$ Fixed MOH cost: $420,000$

Direct LH needed: $150,000$

Variable Direct LH: $4\mathrm{.}60$

$\frac{420,000}{150,000}+4\mathrm{.}60=7\mathrm{.}40$

$$7\mathrm{.}40=$ Predetermined $OH$ rate

b$.)$

$DM=$$$195,$

$DL=$$$288,15(7\mathrm{.}40)+195+288=594$

Direct $LH=15$ Job $550cost=$$$594$

C$.)$

$200\%$ mark up is the same as

multiplying by $3.$

$5943=1732$

Selling Price:

$$11732$

Same calculation but with Machine hour

Variables

a$.)\frac{420,000}{75,000}+9\mathrm{.}20=14\mathrm{.}80$

b$.)5(14\mathrm{.}80)+195+288=557$

C$.)5573=1671$