Answer: Bill price  ………1653.17

Working notes for the above answer is as under

we have been provided with the information

Sierra’s A/C employs 5 people.

She  makes a profit when she uses a 47 3/8% markup on selling price

employees pay is$21.75/hr.

Now we wil calculate How much does she bill her customers

47 3/8% markup on selling price equal to 90.02% on cost

i.e

= 47.3/8% / (100-47.375)

=47.275 / 52.625

=90.02%

now Sierra’s A/C employs 5 people and employees $21.75/hr

now if we assume that she paid 5 employee for 1 day and 1 day included 8 hours then her pay i.s cost is

= 21.75 * 5 *8

=870

her cost is 870 and markup on cost is 90.02%

Cost ………………870

Add:

Mark up

(870*90.02%)..783.17

Bill price  ………1653.17