Help check my solver input

[kentalz]

Budget	4,000,000
Maintenance	120,000
Model	Ratio	Cost	Maintenance	Unit Output
F300	1	350,000	12,000	125
S250	3	660,000	22,500	243
TOTAL	4	1,010,000	34,500	368

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Documentation
	Ratio	C7:C8	Input : 3*C7
	Cost	D7:D8	Input : D7*C8
	Maintenance	E7:E8	Input*C7 : Input*C8
	Unit Output	F7:F8	Input*C7 : Input*C8
Documentation(2)
Use Solver to maximize C9
by changing D9:F9
subject to
D9 ≤ C3
E9 ≤ C4

<colgroup><col style="mso-width-source:userset;mso-width-alt:3401;width:70pt" width="93"> <col style="mso-width-source:userset;mso-width-alt:3218;width:66pt" width="88"> <col style="mso-width-source:userset;mso-width-alt:3181;width:65pt" width="87"> <col style="mso-width-source:userset;mso-width-alt:3584;width:74pt" width="98"> <col style="mso-width-source:userset;mso-width-alt:3547;width:73pt" width="97"> </colgroup><tbody>
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I'm trying to get how many of each model to buy so daily production is maximised.
1) F300 model cost $350,000 & S250 cost $220,000
2) At least one third purchase should be F300
3) Maintenance for F300 is $12,000 & S250 is $7,500. Total maintenance budget is 120,000
4) F300 will produce 125 units & S250 will produce 81 units

Thanks.

 

[martindwilson]

which cells are d9 and e9 and D9:F9

 

[kentalz]

d9 is total cost i.e. 1,010,000
e9 is total maintenance i.e. 34,500

D9:F9 (total cost, total maintenance, total unit output)