# Cost

$$
Tier~~up~~Cost=\[Lay\_{n}\* x\_e] +\[Orb\_{n}\*y\_e^2]
$$

$$
Lay\_{n}=Lay~~Mining~~per\~Day\[Lev.\alpha]
$$

$$
Orb\_{n}=Lay~~Mining~~per\~Day\[Lev.\alpha]\*{\sqrt {Lay\_{p}}\over \ \sqrt {Orb\_{p}}}
$$

$$
Lay\_{p}=Lay~~Price
\Orb\_{p}=Orb~~Price
$$

All costs for buildings are determined by the formula above. The cost is based on the amount of $Lay 007 mined. Because it is based on the amount of Lay mined, the Lay value is a fixed cost based on the tier and level of the building, but $Orb is a variable cost. The reason for the variable cost of $Orb is that when the price of $Orb is high, it is unlikely that further construction or upgrades will be triggered.

#### Evolution Cost

$$
x\_e=15
$$

$$
y\_e=15
$$

#### Coefficient of x and y for each tier & level

| Lev   | common | rare | epic | unique | legendary |
| ----- | ------ | ---- | ---- | ------ | --------- |
| 1 Lev | 1.00   | 1.12 | 1.24 | 1.36   | 1.48      |
| 2 Lev | 1.04   | 1.16 | 1.28 | 1.40   | 1.52      |
| 3 Lev | 1.08   | 1.20 | 1.32 | 1.44   | 1.56      |

The table above shows the coefficients by Tier & Level for the values of x, y. In other words, the values of x, y increase as the level and tier increase.

#### $Lay Cost

|           | common | rare   | epic    | unique  | legendary |
| --------- | ------ | ------ | ------- | ------- | --------- |
| Evolution | 0.9720 | 3.2400 | 13.3650 | 76.5461 |           |

#### $Orb Cost = Dynamic Cost

{% hint style="info" %}
The value of **x\_e and y\_e** may be adjusted by governance.
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{% hint style="info" %}
**Note: Please note that all figures are subject to change by governance.**
{% endhint %}

{% hint style="info" %}
**Note: The prices of $ORB and $LAY are based on a 24-hour moving average.**
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{% hint style="danger" %} <mark style="color:red;">**Note: Keep in mind that all tokens and NFTs spent on the upgrade are irrevocable and non-refundable.**</mark>
{% endhint %}