The number of blood tests performed and the related costs over the last nine months in Brentline Hospital are given below:

Month January

February March

April May

June July

August September

Blood Tests Performed

$3,1253,5002,5002,1252,2501,5001,5502,7502,875$

Blood

Test Costs $$14,000$

$$14,500$ $$11,500$ $$10,000$ $$11,000$ $ $8,500$ $ $8,400$ $$12,000$ $$13,000$

Required: $1.$ Using the highlow method, estimate the cost formula for blood tests. $2.$ Using the cost formula you derived above, what blood test costs would you expect to be incurred during a month in which $2,300$ blood tests are performed?