Example $(1)$

Find Equipment cost per hour if $P=L.E\mathrm{.}127010,$ no salvage value, useful life $=5$ years, operating hrs$.=1400$ hrs$./$year$.$ Interest rate $=9\%,$ taxes & insurance $=6\%,$ storage $=5\%$

Grease consumption $=0\mathrm{.}25k\frac{g}{h}r.,$ grease cost $=2\mathrm{.}5L\frac{E}{k}g$

Fuel consumption $=14$ litr.$/$hr$.,$ fuel cost $=0\mathrm{.}5L\frac{E}{?}$ litr.

Lubrication consumption $=0\mathrm{.}5$ litr.$/\frac{?}{hr}.,$ lubrication cost $=10L\frac{E}{?}$ litr

Maintenance & repair $=100\%$ of annua; straight line depreciation

Annual Ownership Cost

$A=A_1-A_2$

$A_1=P(\frac{A}{P},i,n)=127010[\frac{0\mathrm{.}2[1+0\mathrm{.}2{]}^5}{[1+0\mathrm{.}2{]}^5-1}]=42469\mathrm{.}57L\frac{E}{y}$edr

$=\frac{A_1}{1400}=30\mathrm{.}335L\frac{E}{h}r$

$A_2=F(\frac{A}{P},i,n)=0,No$ salvage value

:$.A=30\mathrm{.}34L\frac{E}{h}$

Continue the answer and i dont know the $0\mathrm{.}2$ came from

Thanks in advance...