I'm often asked how much the Megaprocessor has cost, and what's in it. In the past I've given various answers. Now (March 2016) I'm near the end of the project I thought I'd rootle through the paperwork and try and come up with a more accurate answer. And the answer is more than I thought and certainly more than I planned at the start (which was maybe £5,000~£10,000).

Total cost is now nudging over £40,000 which splits roughly:

Electronics	£19,000
PCBs	£14,000
Aluminium	£3,500
Tools (scope etc)	£2,000
Name Plates + engraving	£900
Artwork + printing	£900
Wood, fasteners, etc	£500

The electronics cost splits roughly

Transistors	£2000
Cable	£1800
Connectors	£5000
Chips (test tools, 7 segment displays)	£850
Resistors	£370
Power supplies	£800
LEDs	£1300
Solder	£370
Hardware	£1100
not sure where the rest went

Some stats:

Number of transistors	42,400
Number of resistors	50,500
Number of LEDs	10,500
Number of 20 & 30 way IDC connectors	770
Number of single pin terminals	7,700
Number of solder joints	272,300
Weight of solder	4.25Kg
Weight of lead	2.5Kg
Length of single conductor wire (I've bought 3,100m but have a fair bit left)	1,500m?
Length of 20 conductor ribbon	420m
Aggregate length of cable conductors	9.9 km

I used quite a few different board types. My current spreadsheet (not completely accurate) is:

Board Type	transistors on each	LEDs on each	number  used	total transistors	total LEDs
2AND	5	3	72	360	216
3AND	7	4	18	126	72
4AND	9	5	5	45	25
2OR	5	3	54	270	162
3OR	7	4	34	238	136
4OR	9	5	23	207	115
5OR	11	6	16	176	96
8OR	17	9	6	102	54
XOR	7	3	5	35	15
2x2 AND_OR	14	9	47	658	423
2x3 AND_OR	18	11	7	126	77
4x2 AND_OR	26	17	16	416	272
8x2 AND_OR	50	33	9	450	297
1BUF	2	2	28	56	56
4BUF	8	8	5	40	40
4DEC	19	7	8	152	56
16DEC	82	21	7	574	147
2x16MUX	118	52	3	354	156
4x16MUX	241	93	20	4820	1860
16REG	226	33	8	1808	264
8ADD	302	187	5	1510	935
8LOGIC	158	126	3	474	378
BUS SPLIT	16	16	119	1904	1904
BUS SPLIT(no LEDs)	0	0	9	0	0
3x2 DIGIT (7 segment)	0	0	8	0	0
4 DIGIT(7 segment)	0	0	11	0	0
16 DIGIT(7 segment)	0	0	2	0	0
BUS 2 BUS	0	0	40	0	0
2 TEE	0	0	17	0	0
4 TEE	0	0	15	0	0
BYTE_2_WORD	0	0	13	0	0
SHIFT	37	34	8	296	272
8B RAM	766	64	32	24512	2048
4 MEM MUX	252	40	10	2520	400
2 MEM MUX	141	24	1	141	24
			Totals:	42370	10500