Toronto General Hospital is reviewing ways of cutting the cost of stocking medical supplies. Two new stockless systems are being

considered, to lower the hospital's holding and handling costs. The hospital's industrial engineer has compiled the relevant financial data

for each system as follows $($dollar values are in millions$)$:

The system life of $7$ years represents the period that the contract with the medical suppliers is in force. Only $IRR$ needs to be

calculated. The hospital's MARR is $9\%,$

a$)$ What is the incremental rate of return going from the current practice to the just in time system?

$IRR$ for $($Just in time $-$ Current practice$)=,\%$

b$)$ What is the incremental rate of return going from the just in time system to the stockless supply system?

$IRR$ for $($Stockless supply $-$ Just in time$)=,\%$

c$)$ What is the incremental rate of return going from the current practice to the stockless supply system?

$IRR$ for $($Stockless supply $-$ Current practice$)=|,\%$

d$)$ Based on the above calculated numbers, which option is the best by utilizing the incremental rate of return criterion?

$($keep $2$ decimal places in numerical results$)$