Evana Blanca owns a construction firm that builds beautiful concrete walls with reinforced steel. Her

holding costs are $25\%$ per year.

$($Round your answer to the nearest whole number.$)$

Evana is charged $$400$ per delivery of steel rebar. Each rebar costs $$200.$

a$.$ She needs $150$ rebars per week. How many rebars should she purchase

from the supplier with each order?

$($Round your answer to $2$ decimal places.$)$

Evana receives deliveries of $6,000$ cinder blocks at a time. There is a fixed

cost of $$300$ per cinder block delivery. She needs $500$ cinder blocks per

b$.$ day. Each cinder block costs $$2,$ so she incurs holding cost of $$0\mathrm{.}5$ to hold a

cinder block in inventory for one year $($i$.$e$.,25\%$ of $$2).$ What is Evana's total

per block

total ordering and holding costs $($$$)$ per cinder block?

$($Round your answer to $2$ decimal places.$)$

Evana is offered a great deal on cinder blocks. If she were to order $36,000$

blocks at a time, she would receive a $15$ percent discount. Say she decides

c$.$ to switch to purchasing $36,000$ cinder blocks with each order so that she

per day

can take advantage of the deal. What would be her average inventory

holding cost $($$$)$ per day? Note: Do not include ordering or purchasing costs.