Multiple steps here, but here's the general outline:
Step 1: Compute a 5 year schedule of cash flows
Step 2: Compute a Discounted Cash flow
Step 3: Compute NPV
Step 4: Compute IRR
Step 4: Calculate PI
Step 1: Schedule of Cash flows
You will have 6 cash flows
Year 0 = - outflow of the initial investment + (-cash outlay for the project)
Year 1,2,3,4,5 = Revenue from selling meals - cost of meals - depreciation - transport costs
Year 0 = -2,500 + (-30,000) = -32,500
Year 1 = [ 1 x 30,000 ] - [ 0.60 x 30,000] - 1,500 - 2,000 = 8,500
Year 2 = [ 1 x 32,000 ] - [ 0.60 x 32,000] - 1,500 - 2,000 = 7,300
Year 3 = [ 1 x 32,000 ] - [ 0.60 x 32,000] - 1,500 - 2,000 = 7,300
Year 4 = [ 1.20 x 33,000 ] - [ 0.70 x 33,000] - 1,500 - 2,000 = 13,000
Year 5 = [ 1.20 x 33,000 ] - [ 0.70 x 33,000] - 1,500 - 2,000 = 13,000
Step 2: Discounted Cash Flow
This will entail you taking the future cash flows dividing it by (1+r)^n
r = cost of capital
n = number of years
Year 0 = -32,500 (do not discount the initial cash outlay....only future years)
Year 1 = 8,500 / (1+0.14)^1 = 7,456.14
Year 2 = 7,300 / (1+0.14)^2 = 5,617.11
Year 3 = 7,300 / (1+0.14)^3 = 4,927.29
Year 4 = 16,500 / (1+0.14)^4 = 9,769.32
Year 5 = 16,500 / (1+0.14)^5 = 8,569.58
Step 3: Net Present Value
Simply sum up the Cash flows
-32,500 + 7,456.14 + 5,617.11 + 4,927.29 + 9,769.32 + 8,569.58 = 18338.90
Step 4: IRR
You'll need a financial calculator. IRR here means you want to find the required rate of return that will make the NPV = 0
Using the series of cash flows above, IRR = 3.62%
Step 5: Payback Period
Payback period = Cash outlay/Cash inflows (we're simply finding when we'll breakeven on the project)
Year 1 = -32,500 + 8,500 = -24,000 (so at least 1 year)
Year 2 = -24,000 + 7,300 = -16,700 (so at least 2 years)
Year 3 = -16,700 + 7,300 = -9,400 (so at least 3 years)
Year 4 = -9,400 + 13,000 = 3,600 (so between 3 and 4 years)
To find the fraction of the year in the 3rd year take the amount that is still needed to be back and divide it by the total cash inflow for the year:
fraction of year = 9,400/13,000 = 0.723
So, the profitabilitiy index is 3.723 years which meets management's critera of within 4 years. However, even if the PI was > 4 years, you would still accept the project because it is not factoring in cash flows beyond year 5 and because the discount rate is being used as a hurdle and shows that the project is profitable anyhow over a 5 year period
That was fun
Edit:
@Sk...it's included, and to be honest, I am still unsure about whether or not to amortize that cost out across all 5 years. Depends on what the teacher wants, and in the real world, the accounting treatment says to do that